Deck 18: Electrochemistry

ملء الشاشة (f)
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سؤال
Balance the following redox reaction if it occurs in basic solution.What are the coefficients in front of Cr(OH)4and ClO in the balanced reaction?
Cr(OH)4⁻(aq)+ ClO⁻(aq)→ CrO42-(aq)+ Cl⁻(aq)

A)Cr(OH)4 = 2,ClO⁻ = 3
B)Cr(OH)4= 1,ClO⁻ = 1
C)Cr(OH)4 = 1,ClO⁻ = 2
D)Cr(OH)4⁻ = 2,ClO⁻ = 6
E)Cr(OH)4⁻ = 6,ClO⁻ = 5
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سؤال
What is the reducing agent in the redox reaction represented by the following cell notation?
Ni(s)∣ Ni2+(aq)∣∣ Ag+(aq)∣ Ag(s)

A)Ni(s)
B)Ni2+(aq)
C)Ag+(aq)
D)Ag(s)
E)Pt
سؤال
Balance the following redox reaction if it occurs in basic solution.What are the coefficients in front of Al and F2 in the balanced reaction?
Al(s)+ F2(g)→ Al3+(aq)+ F-(aq)

A)Al = 2,F2 = 3
B)Al = 2,F2 = 6
C)Al = 1,F2 = 1
D)Al = 2,F2 = 1
E)Al = 3,F2 = 2
سؤال
Balance the following redox reaction if it occurs in basic solution.What are the coefficients in front of ClO2 and H2O in the balanced reaction?
H2O2(l)+ ClO2(aq)→ ClO2⁻(aq)+ O2(g)

A)ClO2 = 1,H2O = 1
B)ClO2 = 1,H2O = 2
C)ClO2 = 4,H2O = 3
D)ClO2 = 4,H2O = 2
E)ClO2 = 2,H2O = 2
سؤال
What element is being reduced in the following redox reaction?
MnO4⁻(aq)+ H2C2O4(aq)→ Mn2+(aq)+ CO2(g)

A)C
B)O
C)Mn
D)H
سؤال
What element is being oxidized in the following redox reaction?
Zn2+(aq)+ NH4+(aq)→ Zn(s)+ NO3⁻(aq)

A)Zn
B)N
C)H
D)O
سؤال
Determine the cell notation for the redox reaction given below.
3 Cl2(g)+ 2 Fe(s)→ 6 Cl⁻(aq)+ 2 Fe3+(aq)

A)Cl2(g)∣ Cl⁻(aq)∣ Pt ∣∣ Fe(s)∣ Fe3+(aq)
B)Cl⁻(aq)∣ Cl2(g)∣ Pt ∣∣ Fe3+(aq) Fe(s)
C)Fe3+(aq)∣ Fe(s)∣∣ Cl⁻(aq)∣ Cl2(g)∣ Pt
D)Fe(s)∣ Cl2(g)∣∣ Fe3+(aq)∣ Cl⁻(aq)∣ Pt
E)Fe(s)∣ Fe3+(aq)∣∣ Cl2(g)∣ Cl⁻(aq)∣ Pt
سؤال
Balance the following redox reaction if it occurs in acidic solution.What are the coefficients in front of H⁺ and Fe3+ in the balanced reaction?
Fe2+(aq)+ MnO4⁻(aq)→ Fe3+(aq)+ Mn2+(aq)

A)H+ = 2,Fe3+ = 3
B)H+ = 8,Fe3+ = 5
C)H+ = 3,Fe3+ = 2
D)H+ = 5,Fe3+ = 1
E)H+ = 8,Fe3+ = 1
سؤال
Balance the following redox reaction if it occurs in acidic solution.What are the coefficients in front of Zn and H+ in the balanced reaction?
Zn2+(aq)+ NH4+(aq)→ Zn(s)+ NO3⁻(aq)

A)Zn = 1,H+ = 8
B)Zn = 1,H+ = 4
C)Zn = 4,H+ = 10
D)Zn = 2,H+ = 4
E)Zn = 3,H+ = 5
سؤال
Determine the redox reaction represented by the following cell notation.
Mg(s)∣ Mg2+(aq)∣∣ Cu2+(aq)∣ Cu(s)

A)Cu(s)+ Mg2+(aq)→ Mg(s)+ Cu2+(aq)
B)Mg(s)+ Cu2+(aq)→ Cu(s)+ Mg2+(aq)
C)2 Mg(s)+ Cu2+(aq)→ Cu(s)+ 2 Mg2+(aq)
D)2 Cu(s)+ Mg2+(aq)→ Mg(s)+ 2 Cu2+(aq)
E)3 Mg(s)+ 2 Cu2+(aq)→ 2 Cu(s)+ 3 Mg2+(aq)
سؤال
Balance the following redox reaction if it occurs in basic solution.What are the coefficients in front of Br2 and OH⁻ in the balanced reaction?
Br2(l)→ BrO3⁻(aq)+ Br⁻(aq)

A)Br2 = 1,OH = 2
B)Br2 = 2,OH = 5
C)Br2 = 3,OH = 3
D)Br2 = 3,OH = 6
E)Br2 = 1,OH = 6
سؤال
Identify oxidation.

A)increase in oxidation number
B)loss of electrons
C)gain of electrons
D)decrease in oxidation number
E)both A and B
سؤال
What element is being oxidized in the following redox reaction?
Cr(OH)4⁻(aq)+ ClO⁻(aq)→ CrO42-(aq)+ Cl⁻(aq)

A)Cr
B)O
C)H
D)Cl
سؤال
Balance the following redox reaction if it occurs in acidic solution.What are the coefficients in front of H2C2O4 and H2O in the balanced reaction?
MnO4⁻(aq)+ H2C2O4(aq)→ Mn2+(aq)+ CO2(g)

A)H2C2O4 = 5,H2O = 8
B)H2C2O4 = 1,H2O = 1
C)H2C2O4 = 5,H2O = 1
D)H2C2O4 = 1,H2O = 4
E)H2C2O4 = 3,H2O = 2
سؤال
Balance the following redox reaction if it occurs in acidic solution.What are the coefficients in front of Cd and Ag+ in the balanced reaction?
Cd(s)+ Ag+(aq)→ Ag(s)+ Cd2+(aq)

A)Cd = 1,Ag+ = 2
B)Cd = 1,Ag+ = 1
C)Cd = 2,Ag+ = 1
D)Cd = 2,Ag+ = 2
E)Cd = 3,Ag+ = 1
سؤال
Determine the cell notation for the redox reaction given below.
Sn(s)+ 2 Ag⁺(aq)→ Sn2+(aq)+ 2 Ag(s)

A)Ag+(aq)∣ Ag(s)∣∣ Sn(s)∣ Sn2+(aq)
B)Ag(s)∣ Ag+(aq)∣∣ Sn2+(aq)∣ Sn(s)
C)Sn(s)∣ Sn2+(aq)∣∣ Ag+(aq)∣ Ag(s)
D)Sn2+(aq)∣ Sn(s)∣∣ Ag(s)∣ Ag+(aq)
E)Sn(s)∣ Ag(s)∣∣ Sn2+(aq)∣ Ag+(aq)
سؤال
What element is being reduced in the following redox reaction?
H2O2(l)+ ClO2(aq)→ ClO2⁻(aq)+ O2(g)

A)H
B)O
C)Cl
D)N
E)C
سؤال
What is the oxidizing agent in the redox reaction represented by the following cell notation?
Fe(s)∣ Fe3+(aq)<strong>What is the oxidizing agent in the redox reaction represented by the following cell notation? Fe(s)∣ Fe<sup>3+</sup>(aq) Cl<sub>2</sub>(g)∣ Cl⁻(aq)∣ Pt</strong> A)Fe(s) B)Fe<sup>3+</sup>(aq) C)Cl<sub>2</sub>(g) D)Cl⁻(aq) E)Pt <div style=padding-top: 35px> Cl2(g)∣ Cl⁻(aq)∣ Pt

A)Fe(s)
B)Fe3+(aq)
C)Cl2(g)
D)Cl⁻(aq)
E)Pt
سؤال
Determine the cell notation for the redox reaction given below.
Pb(s)+ 2 H⁺(aq)→ Pb2+(aq)+ H2(g)

A)H+(aq)∣ H2(g)∣ Pt ∣∣ Pb(s)∣ Pb2+(aq)
B)H2(g)∣ H+(aq)∣ Pt ∣∣ Pb2+(aq)∣ Pb(s)
C)Pb2+(aq)∣ Pb(s)∣∣ H2(g)∣ H+(aq)∣ Pt
D)Pb(s)∣ Pb2+(aq)∣∣ H+(aq)∣ H2(g)∣ Pt
E)Pb(s)∣ H2(g)∣∣ Pb2+(aq)∣ H+(aq)∣ Pt
سؤال
Identify the location of oxidation in an electrochemical cell.

A)the anode
B)the cathode
C)the electrode
D)the salt bridge
E)the socket
سؤال
Use the standard half-cell potentials listed below to calculate the standard cell potential for the following reaction occurring in an electrochemical cell at 25°C.(The equation is balanced. )
Sn(s)+ 2 Ag⁺(aq)→ Sn2+(aq)+ 2 Ag(s)
<strong>Use the standard half-cell potentials listed below to calculate the standard cell potential for the following reaction occurring in an electrochemical cell at 25°C.(The equation is balanced. ) Sn(s)+ 2 Ag⁺(aq)→ Sn<sup>2+</sup>(aq)+ 2 Ag(s)  </strong> A)1.74 V B)0.94 V C)1.08 V D)-1.08 V E)-1.74 V <div style=padding-top: 35px>

A)1.74 V
B)0.94 V
C)1.08 V
D)-1.08 V
E)-1.74 V
سؤال
What is undergoing oxidation in the redox reaction represented by the following cell notation?
Pb(s)∣ Pb2+(aq)∣∣ H+(aq)∣ H2(g)∣ Pt

A)H2(g)
B)H+(aq)
C)Pb2+(aq)
D)Pb(s)
E)Pt
سؤال
What is undergoing reduction in the redox reaction represented by the following cell notation?
Fe(s)∣ Fe3+(aq)∣∣ Cl2(g)∣ Cl⁻(aq)∣ Pt

A)Fe(s)
B)Fe3+(aq)
C)Cl2(g)
D)Cl⁻(aq)
E)Pt
سؤال
Determine which of the following pairs of reactants will result in a spontaneous reaction at 25°C. <strong>Determine which of the following pairs of reactants will result in a spontaneous reaction at 25°C.  </strong> A)Pb<sup>2+</sup>(aq)+ Cu(s) B)Ag<sup>+</sup>(aq)+ Br⁻(aq) C)Li<sup>+</sup>(aq)+ Al(s) D)Fe<sup>3+</sup>(aq)+ Ni(s) E)None of the above pairs will react. <div style=padding-top: 35px>

A)Pb2+(aq)+ Cu(s)
B)Ag+(aq)+ Br⁻(aq)
C)Li+(aq)+ Al(s)
D)Fe3+(aq)+ Ni(s)
E)None of the above pairs will react.
سؤال
Which of the following is the weakest reducing agent? <strong>Which of the following is the weakest reducing agent?  </strong> A)Al(s) B)Zn(s) C)Mg(s) D)Al<sup>3+</sup>(aq) E)Mg<sup>2+</sup>(aq) <div style=padding-top: 35px>

A)Al(s)
B)Zn(s)
C)Mg(s)
D)Al3+(aq)
E)Mg2+(aq)
سؤال
Which of the following is the weakest oxidizing agent? <strong>Which of the following is the weakest oxidizing agent?  </strong> A)H<sub>2</sub>O<sub>2</sub>(aq) B)Fe<sup>3+</sup>(aq) C)ClO<sub>2</sub>(g) D)I<sub>2</sub>(s) E)Fe(s) <div style=padding-top: 35px>

A)H2O2(aq)
B)Fe3+(aq)
C)ClO2(g)
D)I2(s)
E)Fe(s)
سؤال
Use the standard half-cell potentials listed below to calculate the standard cell potential for the following reaction occurring in an electrochemical cell at 25°C.(The equation is balanced. )
3 Cl2(g)+ 2 Fe(s)→ 6 Cl⁻(aq)+ 2 Fe3+(aq)
<strong>Use the standard half-cell potentials listed below to calculate the standard cell potential for the following reaction occurring in an electrochemical cell at 25°C.(The equation is balanced. ) 3 Cl<sub>2</sub>(g)+ 2 Fe(s)→ 6 Cl⁻(aq)+ 2 Fe<sup>3+</sup>(aq)  </strong> A)4.16 V B)-1.40 V C)-1.32 V D)1.32 V E)1.40 V <div style=padding-top: 35px>

A)4.16 V
B)-1.40 V
C)-1.32 V
D)1.32 V
E)1.40 V
سؤال
Use the standard half-cell potentials listed below to calculate the standard cell potential for the following reaction occurring in an electrochemical cell at 25 °C.(The equation is balanced. )
2 K(s)+ I2(s)→ 2 K⁺(aq)+ 2 I⁻(aq)
<strong>Use the standard half-cell potentials listed below to calculate the standard cell potential for the following reaction occurring in an electrochemical cell at 25 °C.(The equation is balanced. ) 2 K(s)+ I<sub>2</sub>(s)→ 2 K⁺(aq)+ 2 I⁻(aq)  </strong> A)6.40 V B)1.85 V C)-5.32 V D)3.47 V E)5.32 V <div style=padding-top: 35px>

A)6.40 V
B)1.85 V
C)-5.32 V
D)3.47 V
E)5.32 V
سؤال
Use the standard half-cell potentials listed below to calculate the standard cell potential for the following reaction occurring in an electrochemical cell at 25°C.(The equation is balanced. )
Mg(s)+ Cu2+(aq)→ Cu(s)+ Mg2+(aq)
<strong>Use the standard half-cell potentials listed below to calculate the standard cell potential for the following reaction occurring in an electrochemical cell at 25°C.(The equation is balanced. ) Mg(s)+ Cu<sup>2+</sup>(aq)→ Cu(s)+ Mg<sup>2+</sup>(aq)  </strong> A)2.04 V B)-2.04 V C)2.72 V D)-1.36 V E)1.36 V <div style=padding-top: 35px>

A)2.04 V
B)-2.04 V
C)2.72 V
D)-1.36 V
E)1.36 V
سؤال
What statement is not true about standard electrode potentials?

A)E°cell is positive for spontaneous reactions.
B)Electrons will flow from more negative electrode to more positive electrode.
C)The electrode potential of the standard hydrogen electrode is exactly zero.
D)E°cell is the difference in voltage between the anode and the cathode.
E)The electrode in any half-cell with a greater tendency to undergo reduction is positively charged relative to the standard hydrogen electrode and therefore has a positive E°.
سؤال
Which of the following is the strongest oxidizing agent? <strong>Which of the following is the strongest oxidizing agent?  </strong> A)Br<sub>2</sub>(l) B)Au<sup>3+</sup>(aq) C)Ag(s) D)Br⁻(aq) E)Au(s) <div style=padding-top: 35px>

A)Br2(l)
B)Au3+(aq)
C)Ag(s)
D)Br⁻(aq)
E)Au(s)
سؤال
Use the standard half-cell potentials listed below to calculate the standard cell potential for the following reaction occurring in an electrochemical cell at 25°C.(The equation is balanced. )
Pb(s)+ Br2(l)→ Pb2+(aq)+ 2 Br⁻(aq)
<strong>Use the standard half-cell potentials listed below to calculate the standard cell potential for the following reaction occurring in an electrochemical cell at 25°C.(The equation is balanced. ) Pb(s)+ Br<sub>2</sub>(l)→ Pb<sup>2+</sup>(aq)+ 2 Br⁻(aq)  </strong> A)1.20 V B)0.94 V C)-0.94 V D)-1.20 V E)-0.60 V <div style=padding-top: 35px>

A)1.20 V
B)0.94 V
C)-0.94 V
D)-1.20 V
E)-0.60 V
سؤال
Determine which of the following pairs of reactants will result in a spontaneous reaction at 25°C. <strong>Determine which of the following pairs of reactants will result in a spontaneous reaction at 25°C.  </strong> A)I<sup>-</sup>(aq)+ Zn<sup>2+</sup>(aq) B)Ca(s)+ Mg<sup>2+</sup>(aq) C)H<sub>2</sub>(g)+ Cd<sup>2+</sup>(aq) D)Ag(s)+ Sn<sup>2+</sup>(aq) E)All of the above pairs will react. <div style=padding-top: 35px>

A)I-(aq)+ Zn2+(aq)
B)Ca(s)+ Mg2+(aq)
C)H2(g)+ Cd2+(aq)
D)Ag(s)+ Sn2+(aq)
E)All of the above pairs will react.
سؤال
Which of the following is the strongest reducing agent? <strong>Which of the following is the strongest reducing agent?  </strong> A)Sn<sup>2+</sup>(aq) B)Cr<sup>3+</sup>(aq) C)Sn<sup>4+</sup>(aq) D)Cr(s) E)Sn(s) <div style=padding-top: 35px>

A)Sn2+(aq)
B)Cr3+(aq)
C)Sn4+(aq)
D)Cr(s)
E)Sn(s)
سؤال
What is the oxidizing agent in the redox reaction represented by the following cell notation?
Sn(s)∣ Sn2+(aq)∣∣ Ag+(aq)∣ Ag(s)

A)Sn(s)
B)Ag+(aq)
C)Sn2+(aq)
D)Ag(s)
E)Pt
سؤال
Which of the following is the strongest oxidizing agent? <strong>Which of the following is the strongest oxidizing agent?  </strong> A)MnO<sub>2</sub>(s) B)Cl⁻(aq) C)Cu⁺(aq) D)SO<sub>4</sub><sup>2-</sup>(aq) E)MnO<sub>4</sub>⁻(aq) <div style=padding-top: 35px>

A)MnO2(s)
B)Cl⁻(aq)
C)Cu⁺(aq)
D)SO42-(aq)
E)MnO4⁻(aq)
سؤال
Which of the following is the strongest reducing agent? <strong>Which of the following is the strongest reducing agent?  </strong> A)Al(s) B)Zn(s) C)Mg(s) D)Al<sup>3+</sup>(aq) E)Mg<sup>2+</sup>(aq) <div style=padding-top: 35px>

A)Al(s)
B)Zn(s)
C)Mg(s)
D)Al3+(aq)
E)Mg2+(aq)
سؤال
Which of the following is the strongest reducing agent? <strong>Which of the following is the strongest reducing agent?  </strong> A)Na(s) B)Li<sup>+</sup>(aq) C)Ca(s) D)Ca<sup>2+</sup>(aq) E)Li(s) <div style=padding-top: 35px>

A)Na(s)
B)Li+(aq)
C)Ca(s)
D)Ca2+(aq)
E)Li(s)
سؤال
Determine which of the following pairs of reactants will result in a spontaneous reaction at 25°C. <strong>Determine which of the following pairs of reactants will result in a spontaneous reaction at 25°C.  </strong> A)Sn<sup>4+</sup>(aq)+ Mg(s) B)Cr<sup>3+</sup>(aq)+ Ni(s) C)Zn(s)+ Na<sup>+</sup>(aq) D)Fe(s)+ Ba<sup>2+</sup>(aq) E)None of the above pairs will react. <div style=padding-top: 35px>

A)Sn4+(aq)+ Mg(s)
B)Cr3+(aq)+ Ni(s)
C)Zn(s)+ Na+(aq)
D)Fe(s)+ Ba2+(aq)
E)None of the above pairs will react.
سؤال
Which of the following is the strongest oxidizing agent? <strong>Which of the following is the strongest oxidizing agent?  </strong> A)H<sub>2</sub>O<sub>2</sub>(aq) B)Fe<sup>3+</sup>(aq) C)ClO<sub>2</sub>(g) D)I<sub>2</sub>(s) E)Fe(s) <div style=padding-top: 35px>

A)H2O2(aq)
B)Fe3+(aq)
C)ClO2(g)
D)I2(s)
E)Fe(s)
سؤال
Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C.
Sn(s)∣ Sn2+(aq,0.022 M)<strong>Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C. Sn(s)∣ Sn<sup>2+</sup>(aq,0.022 M) Ag<sup>+</sup>(aq,2.7 M)∣ Ag(s)  </strong> A)1.01 V B)-0.83 V C)1.31 V D)0.01 V E)-0.66 V <div style=padding-top: 35px> Ag+(aq,2.7 M)∣ Ag(s)
<strong>Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C. Sn(s)∣ Sn<sup>2+</sup>(aq,0.022 M) Ag<sup>+</sup>(aq,2.7 M)∣ Ag(s)  </strong> A)1.01 V B)-0.83 V C)1.31 V D)0.01 V E)-0.66 V <div style=padding-top: 35px>

A)1.01 V
B)-0.83 V
C)1.31 V
D)0.01 V
E)-0.66 V
سؤال
Give the criteria for a nonspontaneous reaction.

A)ΔG° < 0,E°cell > 0,K > 1
B)ΔG° > 0,E°cell > 0,K > 1
C)ΔG° > 0,E°cell < 0,K > 1
D)ΔG° < 0,E°cell > 0,K < 1
E)ΔG° > 0,E°cell < 0,K < 1
سؤال
Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C.
Sn(s)∣ Sn2+(aq,1.8 M)∣∣ Ag+(aq,0.055 M)∣ Ag(s)
<strong>Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C. Sn(s)∣ Sn<sup>2+</sup>(aq,1.8 M)∣∣ Ag<sup>+</sup>(aq,0.055 M)∣ Ag(s)  </strong> A)-0.94 V B)-0.85 V C)+1.02 V D)+0.98 V E)+0.86 V <div style=padding-top: 35px>

A)-0.94 V
B)-0.85 V
C)+1.02 V
D)+0.98 V
E)+0.86 V
سؤال
How many electrons are transferred in the following reaction? (The reaction is unbalanced. )
Mg(s)+ Al3+(aq)→ Al(s)+ Mg2+(aq)

A)6
B)2
C)3
D)1
E)4
سؤال
Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C.
Fe(s)∣ Fe3+(aq,0.0011 M)∣∣ Fe3+(aq,2.33 M)∣ Fe(s)
<strong>Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C. Fe(s)∣ Fe<sup>3+</sup>(aq,0.0011 M)∣∣ Fe<sup>3+</sup>(aq,2.33 M)∣ Fe(s)  </strong> A)0.066 V B)-0.036 V C)0.00 V D)-0.099 V E)0.20 V <div style=padding-top: 35px>

A)0.066 V
B)-0.036 V
C)0.00 V
D)-0.099 V
E)0.20 V
سؤال
Which of the following reactions would be the most spontaneous at 298 K?

A)A + 2 B → C;E°cell = 0.98 V
B)A + B → 2 C;E°cell = -0.030 V
C)A + B → 3 C;E°cell = 0.15 V
D)A + B → C;E°cell = 1.22 V
E)More information is needed to determine.
سؤال
Give the criteria for a spontaneous reaction.

A)ΔG° < 0,E°cell > 0,K > 1
B)ΔG° > 0,E°cell > 0,K > 1
C)ΔG° > 0,E°cell < 0,K > 1
D)ΔG° < 0,E°cell > 0,K < 1
E)ΔG° > 0,E°cell < 0,K < 1
سؤال
Use the tabulated half-cell potentials below to calculate ΔG° for the following redox reaction.
2 Al(s)+ 3 Mg2+(aq)→ 2 Al3+(aq)+ 3 Mg(s)
<strong>Use the tabulated half-cell potentials below to calculate ΔG° for the following redox reaction. 2 Al(s)+ 3 Mg<sup>2+</sup>(aq)→ 2 Al<sup>3+</sup>(aq)+ 3 Mg(s)  </strong> A)4.1 × 10<sup>2</sup> kJ B)1.4 × 10<sup>2</sup> kJ C)-2.3 × 10<sup>2</sup> kJ D)-7.8 × 10<sup>2</sup> kJ E)6.8 × 10<sup>2</sup> kJ <div style=padding-top: 35px>

A)4.1 × 102 kJ
B)1.4 × 102 kJ
C)-2.3 × 102 kJ
D)-7.8 × 102 kJ
E)6.8 × 102 kJ
سؤال
Use the tabulated half-cell potentials below to calculate the equilibrium constant (K)for the following balanced redox reaction at 25°C.
Pb2+(aq)+ Cu(s)→ Pb(s)+ Cu2+(aq)
<strong>Use the tabulated half-cell potentials below to calculate the equilibrium constant (K)for the following balanced redox reaction at 25°C. Pb<sup>2+</sup>(aq)+ Cu(s)→ Pb(s)+ Cu<sup>2+</sup>(aq)  </strong> A)7.9 × 10<sup>-8</sup> B)8.9 × 10<sup>7</sup> C)7.9 × 10<sup>15</sup> D)1.3 × 10<sup>-16</sup> E)1.1 × 10<sup>-8</sup> <div style=padding-top: 35px>

A)7.9 × 10-8
B)8.9 × 107
C)7.9 × 1015
D)1.3 × 10-16
E)1.1 × 10-8
سؤال
Which of the following metals will dissolve in HCl? <strong>Which of the following metals will dissolve in HCl?  </strong> A)Ba B)Na C)Mg D)Al E)All of the above <div style=padding-top: 35px>

A)Ba
B)Na
C)Mg
D)Al
E)All of the above
سؤال
Use the tabulated half-cell potentials below to calculate ΔG° for the following balanced redox reaction.
3 I2(s)+ 2 Fe(s)→ 2 Fe3+(aq)+ 6 I⁻(aq)
<strong>Use the tabulated half-cell potentials below to calculate ΔG° for the following balanced redox reaction. 3 I<sub>2</sub>(s)+ 2 Fe(s)→ 2 Fe<sup>3+</sup>(aq)+ 6 I⁻(aq)  </strong> A)-1.1 × 10<sup>2</sup> kJ B)4.9 × 10<sup>1</sup> kJ C)-9.7 × 10<sup>1</sup> kJ D)2.3 × 10<sup>2</sup> kJ E)-3.3 × 10<sup>2</sup> kJ <div style=padding-top: 35px>

A)-1.1 × 102 kJ
B)4.9 × 101 kJ
C)-9.7 × 101 kJ
D)2.3 × 102 kJ
E)-3.3 × 102 kJ
سؤال
Use the tabulated half-cell potentials below to calculate ΔG° for the following balanced redox reaction.
Pb2+(aq)+ Cu(s)→ Pb(s)+ Cu2+(aq)
<strong>Use the tabulated half-cell potentials below to calculate ΔG° for the following balanced redox reaction. Pb<sup>2+</sup>(aq)+ Cu(s)→ Pb(s)+ Cu<sup>2+</sup>(aq)  </strong> A)-41 kJ B)-0.47 kJ C)46 kJ D)91 kJ E)-21 kJ <div style=padding-top: 35px>

A)-41 kJ
B)-0.47 kJ
C)46 kJ
D)91 kJ
E)-21 kJ
سؤال
Use the tabulated half-cell potentials below to calculate the equilibrium constant (K)for the following balanced redox reaction at 25°C.
2 Al(s)+ 3 Mg2+(aq)→ 2 Al3+(aq)+ 3 Mg(s)
<strong>Use the tabulated half-cell potentials below to calculate the equilibrium constant (K)for the following balanced redox reaction at 25°C. 2 Al(s)+ 3 Mg<sup>2+</sup>(aq)→ 2 Al<sup>3+</sup>(aq)+ 3 Mg(s)  </strong> A)1.1 × 10<sup>72</sup> B)8.9 × 10<sup>-73</sup> C)1.1 × 10<sup>-72</sup> D)1.0 × 10<sup>24</sup> E)4.6 × 10<sup>31</sup> <div style=padding-top: 35px>

A)1.1 × 1072
B)8.9 × 10-73
C)1.1 × 10-72
D)1.0 × 1024
E)4.6 × 1031
سؤال
How many electrons are transferred in the following reaction? (The reaction is unbalanced. )
I2(s)+ Fe(aq)→ Fe3+(s)+ I⁻(aq)

A)1
B)2
C)6
D)3
E)4
سؤال
Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C.
Mg(s)∣ Mg2+(aq,2.74 M)∣∣ Cu2+(aq,0.0033 M)∣ Cu(s)
<strong>Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C. Mg(s)∣ Mg<sup>2+</sup>(aq,2.74 M)∣∣ Cu<sup>2+</sup>(aq,0.0033 M)∣ Cu(s)  </strong> A)-2.80 V B)2.62 V C)2.71 V D)2.12 V E)-1.94 V <div style=padding-top: 35px>

A)-2.80 V
B)2.62 V
C)2.71 V
D)2.12 V
E)-1.94 V
سؤال
Use the tabulated half-cell potentials below to calculate the equilibrium constant (K)for the following balanced redox reaction at 25°C.
3 I2(s)+ 2 Fe(s)→ 2 Fe3+(aq)+ 6 I⁻(aq)
<strong>Use the tabulated half-cell potentials below to calculate the equilibrium constant (K)for the following balanced redox reaction at 25°C. 3 I<sub>2</sub>(s)+ 2 Fe(s)→ 2 Fe<sup>3+</sup>(aq)+ 6 I⁻(aq)  </strong> A)3.5 × 10<sup>-59</sup> B)1.1 × 10<sup>17</sup> C)2.4 × 10<sup>58</sup> D)8.9 × 10<sup>-18</sup> E)1.7 × 10<sup>29</sup> <div style=padding-top: 35px>

A)3.5 × 10-59
B)1.1 × 1017
C)2.4 × 1058
D)8.9 × 10-18
E)1.7 × 1029
سؤال
Which of the following metals will dissolve in nitric acid but not hydrochloric? <strong>Which of the following metals will dissolve in nitric acid but not hydrochloric?  </strong> A)Cd B)Cr C)Mn D)Ag E)Al <div style=padding-top: 35px>

A)Cd
B)Cr
C)Mn
D)Ag
E)Al
سؤال
How many electrons are transferred in the following reaction? (The reaction is unbalanced. )
Fe2+(aq)+ K(s)→ Fe(s)+ K+(aq)

A)1
B)2
C)3
D)4
E)6
سؤال
Which of the following reactions would have the smallest value of K at 298 K?

A)A + B → C;E°cell = +1.22 V
B)A + 2 B → C;E°cell = 0.98 V
C)A + B → 2 C;E°cell = -0.030 V
D)A + B → 3 C;E°cell = 0.15 V
E)More information is needed to determine.
سؤال
Which of the following metals will dissolve in nitric acid but not hydrochloric? <strong>Which of the following metals will dissolve in nitric acid but not hydrochloric?  </strong> A)Fe B)Pb C)Cu D)Sn E)Ni <div style=padding-top: 35px>

A)Fe
B)Pb
C)Cu
D)Sn
E)Ni
سؤال
Explain the use of a salt bridge.
سؤال
Match the following.
Q > K

A)Ecell = E°cell
B)Ecell = 0
C)E°cell < 0
D)Ecell < 0
E)E°cell > 0
F)Ecell > 0
سؤال
For the galvanic cell reaction,expressed below using shorthand notation,what half-reaction occurs at the cathode?
Zn(s)∣ Zn2+(aq)∣∣ Ni2+(aq)∣ Ni(s)

A)Zn(s)→ Zn2+(aq)+ 2 e-
B)Zn2+(aq)+ 2 e- → Zn(s)
C)Ni(s)→ Ni2+(aq)+ 2 e-
D)Ni2+(aq)+ 2 e- → Ni(s)
سؤال
What is the shorthand notation that represents the following galvanic cell reaction?
Pb(s)+ Cu(NO3)2(aq)→ Pb(NO3)2(aq)+ Cu(s)

A)Pb(s)∣ Pb2+(aq)∣∣ Cu2+(aq)∣ Cu(s)
B)Cu(s)∣ Cu2+(aq)∣∣ Pb2+(aq)∣ Pb(s)
C)Pb(s)∣ NO3-(aq)∣∣ NO3-(aq)∣ Cu(s)
D)Cu(s)∣ Cu(NO3)2(aq)∣∣ Pb(NO3)2(aq)∣ Pb(s)
سؤال
What mass of aluminum can be plated onto an object in 755 minutes at 5.80 A of current?

A)73.5 g
B)24.5 g
C)220.g
D)147 g
E)8.17 g
سؤال
Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C.
Al(s)∣ Al3+(aq,0.115 M)∣∣ Al3+(aq,3.89 M)∣ Al(s)
<strong>Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C. Al(s)∣ Al<sup>3+</sup>(aq,0.115 M)∣∣ Al<sup>3+</sup>(aq,3.89 M)∣ Al(s)  </strong> A)1.66 V B)0.060 V C)0.00 V D)0.090 V E)0.030 V <div style=padding-top: 35px>

A)1.66 V
B)0.060 V
C)0.00 V
D)0.090 V
E)0.030 V
سؤال
Explain the significance of the standard hydrogen electrode (SHE)in the tabulation of standard reduction potentials of other species.
سؤال
What is the reduction half-reaction for the following overall galvanic cell reaction?
Zn2+(aq)+ 2 Ag(s)→ Zn(s)+ 2 Ag+(aq)

A)Ag(s)+ e- → Ag+(aq)
B)Ag+(aq)+ e- → Ag(s)
C)Zn2+(aq)+ 2 e- → Zn(s)
D)Zn2+(aq)+ e- → Zn(s)
سؤال
Match the following.
Q = 1

A)Ecell = E°cell
B)Ecell = 0
C)E°cell < 0
D)Ecell < 0
E)E°cell > 0
F)Ecell > 0
سؤال
Match the following.
Q < K

A)Ecell = E°cell
B)Ecell = 0
C)E°cell < 0
D)Ecell < 0
E)E°cell > 0
F)Ecell > 0
سؤال
Match the following.
ΔG° > 0

A)Ecell = E°cell
B)Ecell = 0
C)E°cell < 0
D)Ecell < 0
E)E°cell > 0
F)Ecell > 0
سؤال
Why,if we multiply a reaction by 2,don't we multiply its E°red by 2?
سؤال
Give the type of battery that most cars contain.

A)lead-acid battery
B)dry-cell battery
C)alkaline battery
D)nickel-cadmium battery
E)nickel-metal hydride battery
سؤال
What is the difference between a voltaic cell and an electrolytic cell?
سؤال
Match the following.
ΔG° < 0

A)Ecell = E°cell
B)Ecell = 0
C)E°cell < 0
D)Ecell < 0
E)E°cell > 0
F)Ecell > 0
سؤال
Nickel can be plated from aqueous solution according to the following half reaction.How long would it take (in minutes)to plate 29.6 g of nickel at 4.7 A?
Ni2+(aq)+ 2 e⁻ → Ni(s)

A)1.7 × 102 minutes
B)5.9 × 102 minutes
C)3.5 × 102 minutes
D)4.8 × 102 minutes
E)6.2 × 102 minutes
سؤال
Match the following.
Q = K

A)Ecell = E°cell
B)Ecell = 0
C)E°cell < 0
D)Ecell < 0
E)E°cell > 0
F)Ecell > 0
سؤال
Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C.
Cu(s)∣ Cu2+(aq,0.0032 M)∣∣ Cu2+(aq,4.48 M)∣ Cu(s)
<strong>Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C. Cu(s)∣ Cu<sup>2+</sup>(aq,0.0032 M)∣∣ Cu<sup>2+</sup>(aq,4.48 M)∣ Cu(s)  </strong> A)0.00 V B)0.093 V C)0.34 V D)0.186 V E)0.052 V <div style=padding-top: 35px>

A)0.00 V
B)0.093 V
C)0.34 V
D)0.186 V
E)0.052 V
سؤال
What mass of silver can be plated onto an object in 33.5 minutes at 8.70 A of current?
Ag⁺(aq)+ e⁻ → Ag(s)

A)19.6 g
B)0.326 g
C)9.78 g
D)3.07 g
E)0.102 g
سؤال
Why are iron nails coated with zinc?
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Deck 18: Electrochemistry
1
Balance the following redox reaction if it occurs in basic solution.What are the coefficients in front of Cr(OH)4and ClO in the balanced reaction?
Cr(OH)4⁻(aq)+ ClO⁻(aq)→ CrO42-(aq)+ Cl⁻(aq)

A)Cr(OH)4 = 2,ClO⁻ = 3
B)Cr(OH)4= 1,ClO⁻ = 1
C)Cr(OH)4 = 1,ClO⁻ = 2
D)Cr(OH)4⁻ = 2,ClO⁻ = 6
E)Cr(OH)4⁻ = 6,ClO⁻ = 5
Cr(OH)4 = 2,ClO⁻ = 3
2
What is the reducing agent in the redox reaction represented by the following cell notation?
Ni(s)∣ Ni2+(aq)∣∣ Ag+(aq)∣ Ag(s)

A)Ni(s)
B)Ni2+(aq)
C)Ag+(aq)
D)Ag(s)
E)Pt
Ni(s)
3
Balance the following redox reaction if it occurs in basic solution.What are the coefficients in front of Al and F2 in the balanced reaction?
Al(s)+ F2(g)→ Al3+(aq)+ F-(aq)

A)Al = 2,F2 = 3
B)Al = 2,F2 = 6
C)Al = 1,F2 = 1
D)Al = 2,F2 = 1
E)Al = 3,F2 = 2
Al = 2,F2 = 3
4
Balance the following redox reaction if it occurs in basic solution.What are the coefficients in front of ClO2 and H2O in the balanced reaction?
H2O2(l)+ ClO2(aq)→ ClO2⁻(aq)+ O2(g)

A)ClO2 = 1,H2O = 1
B)ClO2 = 1,H2O = 2
C)ClO2 = 4,H2O = 3
D)ClO2 = 4,H2O = 2
E)ClO2 = 2,H2O = 2
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5
What element is being reduced in the following redox reaction?
MnO4⁻(aq)+ H2C2O4(aq)→ Mn2+(aq)+ CO2(g)

A)C
B)O
C)Mn
D)H
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6
What element is being oxidized in the following redox reaction?
Zn2+(aq)+ NH4+(aq)→ Zn(s)+ NO3⁻(aq)

A)Zn
B)N
C)H
D)O
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7
Determine the cell notation for the redox reaction given below.
3 Cl2(g)+ 2 Fe(s)→ 6 Cl⁻(aq)+ 2 Fe3+(aq)

A)Cl2(g)∣ Cl⁻(aq)∣ Pt ∣∣ Fe(s)∣ Fe3+(aq)
B)Cl⁻(aq)∣ Cl2(g)∣ Pt ∣∣ Fe3+(aq) Fe(s)
C)Fe3+(aq)∣ Fe(s)∣∣ Cl⁻(aq)∣ Cl2(g)∣ Pt
D)Fe(s)∣ Cl2(g)∣∣ Fe3+(aq)∣ Cl⁻(aq)∣ Pt
E)Fe(s)∣ Fe3+(aq)∣∣ Cl2(g)∣ Cl⁻(aq)∣ Pt
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8
Balance the following redox reaction if it occurs in acidic solution.What are the coefficients in front of H⁺ and Fe3+ in the balanced reaction?
Fe2+(aq)+ MnO4⁻(aq)→ Fe3+(aq)+ Mn2+(aq)

A)H+ = 2,Fe3+ = 3
B)H+ = 8,Fe3+ = 5
C)H+ = 3,Fe3+ = 2
D)H+ = 5,Fe3+ = 1
E)H+ = 8,Fe3+ = 1
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9
Balance the following redox reaction if it occurs in acidic solution.What are the coefficients in front of Zn and H+ in the balanced reaction?
Zn2+(aq)+ NH4+(aq)→ Zn(s)+ NO3⁻(aq)

A)Zn = 1,H+ = 8
B)Zn = 1,H+ = 4
C)Zn = 4,H+ = 10
D)Zn = 2,H+ = 4
E)Zn = 3,H+ = 5
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10
Determine the redox reaction represented by the following cell notation.
Mg(s)∣ Mg2+(aq)∣∣ Cu2+(aq)∣ Cu(s)

A)Cu(s)+ Mg2+(aq)→ Mg(s)+ Cu2+(aq)
B)Mg(s)+ Cu2+(aq)→ Cu(s)+ Mg2+(aq)
C)2 Mg(s)+ Cu2+(aq)→ Cu(s)+ 2 Mg2+(aq)
D)2 Cu(s)+ Mg2+(aq)→ Mg(s)+ 2 Cu2+(aq)
E)3 Mg(s)+ 2 Cu2+(aq)→ 2 Cu(s)+ 3 Mg2+(aq)
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11
Balance the following redox reaction if it occurs in basic solution.What are the coefficients in front of Br2 and OH⁻ in the balanced reaction?
Br2(l)→ BrO3⁻(aq)+ Br⁻(aq)

A)Br2 = 1,OH = 2
B)Br2 = 2,OH = 5
C)Br2 = 3,OH = 3
D)Br2 = 3,OH = 6
E)Br2 = 1,OH = 6
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12
Identify oxidation.

A)increase in oxidation number
B)loss of electrons
C)gain of electrons
D)decrease in oxidation number
E)both A and B
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13
What element is being oxidized in the following redox reaction?
Cr(OH)4⁻(aq)+ ClO⁻(aq)→ CrO42-(aq)+ Cl⁻(aq)

A)Cr
B)O
C)H
D)Cl
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14
Balance the following redox reaction if it occurs in acidic solution.What are the coefficients in front of H2C2O4 and H2O in the balanced reaction?
MnO4⁻(aq)+ H2C2O4(aq)→ Mn2+(aq)+ CO2(g)

A)H2C2O4 = 5,H2O = 8
B)H2C2O4 = 1,H2O = 1
C)H2C2O4 = 5,H2O = 1
D)H2C2O4 = 1,H2O = 4
E)H2C2O4 = 3,H2O = 2
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15
Balance the following redox reaction if it occurs in acidic solution.What are the coefficients in front of Cd and Ag+ in the balanced reaction?
Cd(s)+ Ag+(aq)→ Ag(s)+ Cd2+(aq)

A)Cd = 1,Ag+ = 2
B)Cd = 1,Ag+ = 1
C)Cd = 2,Ag+ = 1
D)Cd = 2,Ag+ = 2
E)Cd = 3,Ag+ = 1
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16
Determine the cell notation for the redox reaction given below.
Sn(s)+ 2 Ag⁺(aq)→ Sn2+(aq)+ 2 Ag(s)

A)Ag+(aq)∣ Ag(s)∣∣ Sn(s)∣ Sn2+(aq)
B)Ag(s)∣ Ag+(aq)∣∣ Sn2+(aq)∣ Sn(s)
C)Sn(s)∣ Sn2+(aq)∣∣ Ag+(aq)∣ Ag(s)
D)Sn2+(aq)∣ Sn(s)∣∣ Ag(s)∣ Ag+(aq)
E)Sn(s)∣ Ag(s)∣∣ Sn2+(aq)∣ Ag+(aq)
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17
What element is being reduced in the following redox reaction?
H2O2(l)+ ClO2(aq)→ ClO2⁻(aq)+ O2(g)

A)H
B)O
C)Cl
D)N
E)C
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18
What is the oxidizing agent in the redox reaction represented by the following cell notation?
Fe(s)∣ Fe3+(aq)<strong>What is the oxidizing agent in the redox reaction represented by the following cell notation? Fe(s)∣ Fe<sup>3+</sup>(aq) Cl<sub>2</sub>(g)∣ Cl⁻(aq)∣ Pt</strong> A)Fe(s) B)Fe<sup>3+</sup>(aq) C)Cl<sub>2</sub>(g) D)Cl⁻(aq) E)Pt Cl2(g)∣ Cl⁻(aq)∣ Pt

A)Fe(s)
B)Fe3+(aq)
C)Cl2(g)
D)Cl⁻(aq)
E)Pt
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19
Determine the cell notation for the redox reaction given below.
Pb(s)+ 2 H⁺(aq)→ Pb2+(aq)+ H2(g)

A)H+(aq)∣ H2(g)∣ Pt ∣∣ Pb(s)∣ Pb2+(aq)
B)H2(g)∣ H+(aq)∣ Pt ∣∣ Pb2+(aq)∣ Pb(s)
C)Pb2+(aq)∣ Pb(s)∣∣ H2(g)∣ H+(aq)∣ Pt
D)Pb(s)∣ Pb2+(aq)∣∣ H+(aq)∣ H2(g)∣ Pt
E)Pb(s)∣ H2(g)∣∣ Pb2+(aq)∣ H+(aq)∣ Pt
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20
Identify the location of oxidation in an electrochemical cell.

A)the anode
B)the cathode
C)the electrode
D)the salt bridge
E)the socket
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21
Use the standard half-cell potentials listed below to calculate the standard cell potential for the following reaction occurring in an electrochemical cell at 25°C.(The equation is balanced. )
Sn(s)+ 2 Ag⁺(aq)→ Sn2+(aq)+ 2 Ag(s)
<strong>Use the standard half-cell potentials listed below to calculate the standard cell potential for the following reaction occurring in an electrochemical cell at 25°C.(The equation is balanced. ) Sn(s)+ 2 Ag⁺(aq)→ Sn<sup>2+</sup>(aq)+ 2 Ag(s)  </strong> A)1.74 V B)0.94 V C)1.08 V D)-1.08 V E)-1.74 V

A)1.74 V
B)0.94 V
C)1.08 V
D)-1.08 V
E)-1.74 V
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22
What is undergoing oxidation in the redox reaction represented by the following cell notation?
Pb(s)∣ Pb2+(aq)∣∣ H+(aq)∣ H2(g)∣ Pt

A)H2(g)
B)H+(aq)
C)Pb2+(aq)
D)Pb(s)
E)Pt
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23
What is undergoing reduction in the redox reaction represented by the following cell notation?
Fe(s)∣ Fe3+(aq)∣∣ Cl2(g)∣ Cl⁻(aq)∣ Pt

A)Fe(s)
B)Fe3+(aq)
C)Cl2(g)
D)Cl⁻(aq)
E)Pt
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24
Determine which of the following pairs of reactants will result in a spontaneous reaction at 25°C. <strong>Determine which of the following pairs of reactants will result in a spontaneous reaction at 25°C.  </strong> A)Pb<sup>2+</sup>(aq)+ Cu(s) B)Ag<sup>+</sup>(aq)+ Br⁻(aq) C)Li<sup>+</sup>(aq)+ Al(s) D)Fe<sup>3+</sup>(aq)+ Ni(s) E)None of the above pairs will react.

A)Pb2+(aq)+ Cu(s)
B)Ag+(aq)+ Br⁻(aq)
C)Li+(aq)+ Al(s)
D)Fe3+(aq)+ Ni(s)
E)None of the above pairs will react.
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25
Which of the following is the weakest reducing agent? <strong>Which of the following is the weakest reducing agent?  </strong> A)Al(s) B)Zn(s) C)Mg(s) D)Al<sup>3+</sup>(aq) E)Mg<sup>2+</sup>(aq)

A)Al(s)
B)Zn(s)
C)Mg(s)
D)Al3+(aq)
E)Mg2+(aq)
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26
Which of the following is the weakest oxidizing agent? <strong>Which of the following is the weakest oxidizing agent?  </strong> A)H<sub>2</sub>O<sub>2</sub>(aq) B)Fe<sup>3+</sup>(aq) C)ClO<sub>2</sub>(g) D)I<sub>2</sub>(s) E)Fe(s)

A)H2O2(aq)
B)Fe3+(aq)
C)ClO2(g)
D)I2(s)
E)Fe(s)
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27
Use the standard half-cell potentials listed below to calculate the standard cell potential for the following reaction occurring in an electrochemical cell at 25°C.(The equation is balanced. )
3 Cl2(g)+ 2 Fe(s)→ 6 Cl⁻(aq)+ 2 Fe3+(aq)
<strong>Use the standard half-cell potentials listed below to calculate the standard cell potential for the following reaction occurring in an electrochemical cell at 25°C.(The equation is balanced. ) 3 Cl<sub>2</sub>(g)+ 2 Fe(s)→ 6 Cl⁻(aq)+ 2 Fe<sup>3+</sup>(aq)  </strong> A)4.16 V B)-1.40 V C)-1.32 V D)1.32 V E)1.40 V

A)4.16 V
B)-1.40 V
C)-1.32 V
D)1.32 V
E)1.40 V
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28
Use the standard half-cell potentials listed below to calculate the standard cell potential for the following reaction occurring in an electrochemical cell at 25 °C.(The equation is balanced. )
2 K(s)+ I2(s)→ 2 K⁺(aq)+ 2 I⁻(aq)
<strong>Use the standard half-cell potentials listed below to calculate the standard cell potential for the following reaction occurring in an electrochemical cell at 25 °C.(The equation is balanced. ) 2 K(s)+ I<sub>2</sub>(s)→ 2 K⁺(aq)+ 2 I⁻(aq)  </strong> A)6.40 V B)1.85 V C)-5.32 V D)3.47 V E)5.32 V

A)6.40 V
B)1.85 V
C)-5.32 V
D)3.47 V
E)5.32 V
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29
Use the standard half-cell potentials listed below to calculate the standard cell potential for the following reaction occurring in an electrochemical cell at 25°C.(The equation is balanced. )
Mg(s)+ Cu2+(aq)→ Cu(s)+ Mg2+(aq)
<strong>Use the standard half-cell potentials listed below to calculate the standard cell potential for the following reaction occurring in an electrochemical cell at 25°C.(The equation is balanced. ) Mg(s)+ Cu<sup>2+</sup>(aq)→ Cu(s)+ Mg<sup>2+</sup>(aq)  </strong> A)2.04 V B)-2.04 V C)2.72 V D)-1.36 V E)1.36 V

A)2.04 V
B)-2.04 V
C)2.72 V
D)-1.36 V
E)1.36 V
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30
What statement is not true about standard electrode potentials?

A)E°cell is positive for spontaneous reactions.
B)Electrons will flow from more negative electrode to more positive electrode.
C)The electrode potential of the standard hydrogen electrode is exactly zero.
D)E°cell is the difference in voltage between the anode and the cathode.
E)The electrode in any half-cell with a greater tendency to undergo reduction is positively charged relative to the standard hydrogen electrode and therefore has a positive E°.
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31
Which of the following is the strongest oxidizing agent? <strong>Which of the following is the strongest oxidizing agent?  </strong> A)Br<sub>2</sub>(l) B)Au<sup>3+</sup>(aq) C)Ag(s) D)Br⁻(aq) E)Au(s)

A)Br2(l)
B)Au3+(aq)
C)Ag(s)
D)Br⁻(aq)
E)Au(s)
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32
Use the standard half-cell potentials listed below to calculate the standard cell potential for the following reaction occurring in an electrochemical cell at 25°C.(The equation is balanced. )
Pb(s)+ Br2(l)→ Pb2+(aq)+ 2 Br⁻(aq)
<strong>Use the standard half-cell potentials listed below to calculate the standard cell potential for the following reaction occurring in an electrochemical cell at 25°C.(The equation is balanced. ) Pb(s)+ Br<sub>2</sub>(l)→ Pb<sup>2+</sup>(aq)+ 2 Br⁻(aq)  </strong> A)1.20 V B)0.94 V C)-0.94 V D)-1.20 V E)-0.60 V

A)1.20 V
B)0.94 V
C)-0.94 V
D)-1.20 V
E)-0.60 V
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33
Determine which of the following pairs of reactants will result in a spontaneous reaction at 25°C. <strong>Determine which of the following pairs of reactants will result in a spontaneous reaction at 25°C.  </strong> A)I<sup>-</sup>(aq)+ Zn<sup>2+</sup>(aq) B)Ca(s)+ Mg<sup>2+</sup>(aq) C)H<sub>2</sub>(g)+ Cd<sup>2+</sup>(aq) D)Ag(s)+ Sn<sup>2+</sup>(aq) E)All of the above pairs will react.

A)I-(aq)+ Zn2+(aq)
B)Ca(s)+ Mg2+(aq)
C)H2(g)+ Cd2+(aq)
D)Ag(s)+ Sn2+(aq)
E)All of the above pairs will react.
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34
Which of the following is the strongest reducing agent? <strong>Which of the following is the strongest reducing agent?  </strong> A)Sn<sup>2+</sup>(aq) B)Cr<sup>3+</sup>(aq) C)Sn<sup>4+</sup>(aq) D)Cr(s) E)Sn(s)

A)Sn2+(aq)
B)Cr3+(aq)
C)Sn4+(aq)
D)Cr(s)
E)Sn(s)
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35
What is the oxidizing agent in the redox reaction represented by the following cell notation?
Sn(s)∣ Sn2+(aq)∣∣ Ag+(aq)∣ Ag(s)

A)Sn(s)
B)Ag+(aq)
C)Sn2+(aq)
D)Ag(s)
E)Pt
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36
Which of the following is the strongest oxidizing agent? <strong>Which of the following is the strongest oxidizing agent?  </strong> A)MnO<sub>2</sub>(s) B)Cl⁻(aq) C)Cu⁺(aq) D)SO<sub>4</sub><sup>2-</sup>(aq) E)MnO<sub>4</sub>⁻(aq)

A)MnO2(s)
B)Cl⁻(aq)
C)Cu⁺(aq)
D)SO42-(aq)
E)MnO4⁻(aq)
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37
Which of the following is the strongest reducing agent? <strong>Which of the following is the strongest reducing agent?  </strong> A)Al(s) B)Zn(s) C)Mg(s) D)Al<sup>3+</sup>(aq) E)Mg<sup>2+</sup>(aq)

A)Al(s)
B)Zn(s)
C)Mg(s)
D)Al3+(aq)
E)Mg2+(aq)
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38
Which of the following is the strongest reducing agent? <strong>Which of the following is the strongest reducing agent?  </strong> A)Na(s) B)Li<sup>+</sup>(aq) C)Ca(s) D)Ca<sup>2+</sup>(aq) E)Li(s)

A)Na(s)
B)Li+(aq)
C)Ca(s)
D)Ca2+(aq)
E)Li(s)
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39
Determine which of the following pairs of reactants will result in a spontaneous reaction at 25°C. <strong>Determine which of the following pairs of reactants will result in a spontaneous reaction at 25°C.  </strong> A)Sn<sup>4+</sup>(aq)+ Mg(s) B)Cr<sup>3+</sup>(aq)+ Ni(s) C)Zn(s)+ Na<sup>+</sup>(aq) D)Fe(s)+ Ba<sup>2+</sup>(aq) E)None of the above pairs will react.

A)Sn4+(aq)+ Mg(s)
B)Cr3+(aq)+ Ni(s)
C)Zn(s)+ Na+(aq)
D)Fe(s)+ Ba2+(aq)
E)None of the above pairs will react.
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40
Which of the following is the strongest oxidizing agent? <strong>Which of the following is the strongest oxidizing agent?  </strong> A)H<sub>2</sub>O<sub>2</sub>(aq) B)Fe<sup>3+</sup>(aq) C)ClO<sub>2</sub>(g) D)I<sub>2</sub>(s) E)Fe(s)

A)H2O2(aq)
B)Fe3+(aq)
C)ClO2(g)
D)I2(s)
E)Fe(s)
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41
Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C.
Sn(s)∣ Sn2+(aq,0.022 M)<strong>Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C. Sn(s)∣ Sn<sup>2+</sup>(aq,0.022 M) Ag<sup>+</sup>(aq,2.7 M)∣ Ag(s)  </strong> A)1.01 V B)-0.83 V C)1.31 V D)0.01 V E)-0.66 V Ag+(aq,2.7 M)∣ Ag(s)
<strong>Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C. Sn(s)∣ Sn<sup>2+</sup>(aq,0.022 M) Ag<sup>+</sup>(aq,2.7 M)∣ Ag(s)  </strong> A)1.01 V B)-0.83 V C)1.31 V D)0.01 V E)-0.66 V

A)1.01 V
B)-0.83 V
C)1.31 V
D)0.01 V
E)-0.66 V
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42
Give the criteria for a nonspontaneous reaction.

A)ΔG° < 0,E°cell > 0,K > 1
B)ΔG° > 0,E°cell > 0,K > 1
C)ΔG° > 0,E°cell < 0,K > 1
D)ΔG° < 0,E°cell > 0,K < 1
E)ΔG° > 0,E°cell < 0,K < 1
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43
Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C.
Sn(s)∣ Sn2+(aq,1.8 M)∣∣ Ag+(aq,0.055 M)∣ Ag(s)
<strong>Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C. Sn(s)∣ Sn<sup>2+</sup>(aq,1.8 M)∣∣ Ag<sup>+</sup>(aq,0.055 M)∣ Ag(s)  </strong> A)-0.94 V B)-0.85 V C)+1.02 V D)+0.98 V E)+0.86 V

A)-0.94 V
B)-0.85 V
C)+1.02 V
D)+0.98 V
E)+0.86 V
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44
How many electrons are transferred in the following reaction? (The reaction is unbalanced. )
Mg(s)+ Al3+(aq)→ Al(s)+ Mg2+(aq)

A)6
B)2
C)3
D)1
E)4
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45
Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C.
Fe(s)∣ Fe3+(aq,0.0011 M)∣∣ Fe3+(aq,2.33 M)∣ Fe(s)
<strong>Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C. Fe(s)∣ Fe<sup>3+</sup>(aq,0.0011 M)∣∣ Fe<sup>3+</sup>(aq,2.33 M)∣ Fe(s)  </strong> A)0.066 V B)-0.036 V C)0.00 V D)-0.099 V E)0.20 V

A)0.066 V
B)-0.036 V
C)0.00 V
D)-0.099 V
E)0.20 V
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46
Which of the following reactions would be the most spontaneous at 298 K?

A)A + 2 B → C;E°cell = 0.98 V
B)A + B → 2 C;E°cell = -0.030 V
C)A + B → 3 C;E°cell = 0.15 V
D)A + B → C;E°cell = 1.22 V
E)More information is needed to determine.
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47
Give the criteria for a spontaneous reaction.

A)ΔG° < 0,E°cell > 0,K > 1
B)ΔG° > 0,E°cell > 0,K > 1
C)ΔG° > 0,E°cell < 0,K > 1
D)ΔG° < 0,E°cell > 0,K < 1
E)ΔG° > 0,E°cell < 0,K < 1
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48
Use the tabulated half-cell potentials below to calculate ΔG° for the following redox reaction.
2 Al(s)+ 3 Mg2+(aq)→ 2 Al3+(aq)+ 3 Mg(s)
<strong>Use the tabulated half-cell potentials below to calculate ΔG° for the following redox reaction. 2 Al(s)+ 3 Mg<sup>2+</sup>(aq)→ 2 Al<sup>3+</sup>(aq)+ 3 Mg(s)  </strong> A)4.1 × 10<sup>2</sup> kJ B)1.4 × 10<sup>2</sup> kJ C)-2.3 × 10<sup>2</sup> kJ D)-7.8 × 10<sup>2</sup> kJ E)6.8 × 10<sup>2</sup> kJ

A)4.1 × 102 kJ
B)1.4 × 102 kJ
C)-2.3 × 102 kJ
D)-7.8 × 102 kJ
E)6.8 × 102 kJ
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49
Use the tabulated half-cell potentials below to calculate the equilibrium constant (K)for the following balanced redox reaction at 25°C.
Pb2+(aq)+ Cu(s)→ Pb(s)+ Cu2+(aq)
<strong>Use the tabulated half-cell potentials below to calculate the equilibrium constant (K)for the following balanced redox reaction at 25°C. Pb<sup>2+</sup>(aq)+ Cu(s)→ Pb(s)+ Cu<sup>2+</sup>(aq)  </strong> A)7.9 × 10<sup>-8</sup> B)8.9 × 10<sup>7</sup> C)7.9 × 10<sup>15</sup> D)1.3 × 10<sup>-16</sup> E)1.1 × 10<sup>-8</sup>

A)7.9 × 10-8
B)8.9 × 107
C)7.9 × 1015
D)1.3 × 10-16
E)1.1 × 10-8
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50
Which of the following metals will dissolve in HCl? <strong>Which of the following metals will dissolve in HCl?  </strong> A)Ba B)Na C)Mg D)Al E)All of the above

A)Ba
B)Na
C)Mg
D)Al
E)All of the above
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51
Use the tabulated half-cell potentials below to calculate ΔG° for the following balanced redox reaction.
3 I2(s)+ 2 Fe(s)→ 2 Fe3+(aq)+ 6 I⁻(aq)
<strong>Use the tabulated half-cell potentials below to calculate ΔG° for the following balanced redox reaction. 3 I<sub>2</sub>(s)+ 2 Fe(s)→ 2 Fe<sup>3+</sup>(aq)+ 6 I⁻(aq)  </strong> A)-1.1 × 10<sup>2</sup> kJ B)4.9 × 10<sup>1</sup> kJ C)-9.7 × 10<sup>1</sup> kJ D)2.3 × 10<sup>2</sup> kJ E)-3.3 × 10<sup>2</sup> kJ

A)-1.1 × 102 kJ
B)4.9 × 101 kJ
C)-9.7 × 101 kJ
D)2.3 × 102 kJ
E)-3.3 × 102 kJ
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52
Use the tabulated half-cell potentials below to calculate ΔG° for the following balanced redox reaction.
Pb2+(aq)+ Cu(s)→ Pb(s)+ Cu2+(aq)
<strong>Use the tabulated half-cell potentials below to calculate ΔG° for the following balanced redox reaction. Pb<sup>2+</sup>(aq)+ Cu(s)→ Pb(s)+ Cu<sup>2+</sup>(aq)  </strong> A)-41 kJ B)-0.47 kJ C)46 kJ D)91 kJ E)-21 kJ

A)-41 kJ
B)-0.47 kJ
C)46 kJ
D)91 kJ
E)-21 kJ
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53
Use the tabulated half-cell potentials below to calculate the equilibrium constant (K)for the following balanced redox reaction at 25°C.
2 Al(s)+ 3 Mg2+(aq)→ 2 Al3+(aq)+ 3 Mg(s)
<strong>Use the tabulated half-cell potentials below to calculate the equilibrium constant (K)for the following balanced redox reaction at 25°C. 2 Al(s)+ 3 Mg<sup>2+</sup>(aq)→ 2 Al<sup>3+</sup>(aq)+ 3 Mg(s)  </strong> A)1.1 × 10<sup>72</sup> B)8.9 × 10<sup>-73</sup> C)1.1 × 10<sup>-72</sup> D)1.0 × 10<sup>24</sup> E)4.6 × 10<sup>31</sup>

A)1.1 × 1072
B)8.9 × 10-73
C)1.1 × 10-72
D)1.0 × 1024
E)4.6 × 1031
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54
How many electrons are transferred in the following reaction? (The reaction is unbalanced. )
I2(s)+ Fe(aq)→ Fe3+(s)+ I⁻(aq)

A)1
B)2
C)6
D)3
E)4
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55
Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C.
Mg(s)∣ Mg2+(aq,2.74 M)∣∣ Cu2+(aq,0.0033 M)∣ Cu(s)
<strong>Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C. Mg(s)∣ Mg<sup>2+</sup>(aq,2.74 M)∣∣ Cu<sup>2+</sup>(aq,0.0033 M)∣ Cu(s)  </strong> A)-2.80 V B)2.62 V C)2.71 V D)2.12 V E)-1.94 V

A)-2.80 V
B)2.62 V
C)2.71 V
D)2.12 V
E)-1.94 V
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56
Use the tabulated half-cell potentials below to calculate the equilibrium constant (K)for the following balanced redox reaction at 25°C.
3 I2(s)+ 2 Fe(s)→ 2 Fe3+(aq)+ 6 I⁻(aq)
<strong>Use the tabulated half-cell potentials below to calculate the equilibrium constant (K)for the following balanced redox reaction at 25°C. 3 I<sub>2</sub>(s)+ 2 Fe(s)→ 2 Fe<sup>3+</sup>(aq)+ 6 I⁻(aq)  </strong> A)3.5 × 10<sup>-59</sup> B)1.1 × 10<sup>17</sup> C)2.4 × 10<sup>58</sup> D)8.9 × 10<sup>-18</sup> E)1.7 × 10<sup>29</sup>

A)3.5 × 10-59
B)1.1 × 1017
C)2.4 × 1058
D)8.9 × 10-18
E)1.7 × 1029
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57
Which of the following metals will dissolve in nitric acid but not hydrochloric? <strong>Which of the following metals will dissolve in nitric acid but not hydrochloric?  </strong> A)Cd B)Cr C)Mn D)Ag E)Al

A)Cd
B)Cr
C)Mn
D)Ag
E)Al
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58
How many electrons are transferred in the following reaction? (The reaction is unbalanced. )
Fe2+(aq)+ K(s)→ Fe(s)+ K+(aq)

A)1
B)2
C)3
D)4
E)6
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59
Which of the following reactions would have the smallest value of K at 298 K?

A)A + B → C;E°cell = +1.22 V
B)A + 2 B → C;E°cell = 0.98 V
C)A + B → 2 C;E°cell = -0.030 V
D)A + B → 3 C;E°cell = 0.15 V
E)More information is needed to determine.
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60
Which of the following metals will dissolve in nitric acid but not hydrochloric? <strong>Which of the following metals will dissolve in nitric acid but not hydrochloric?  </strong> A)Fe B)Pb C)Cu D)Sn E)Ni

A)Fe
B)Pb
C)Cu
D)Sn
E)Ni
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61
Explain the use of a salt bridge.
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62
Match the following.
Q > K

A)Ecell = E°cell
B)Ecell = 0
C)E°cell < 0
D)Ecell < 0
E)E°cell > 0
F)Ecell > 0
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63
For the galvanic cell reaction,expressed below using shorthand notation,what half-reaction occurs at the cathode?
Zn(s)∣ Zn2+(aq)∣∣ Ni2+(aq)∣ Ni(s)

A)Zn(s)→ Zn2+(aq)+ 2 e-
B)Zn2+(aq)+ 2 e- → Zn(s)
C)Ni(s)→ Ni2+(aq)+ 2 e-
D)Ni2+(aq)+ 2 e- → Ni(s)
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64
What is the shorthand notation that represents the following galvanic cell reaction?
Pb(s)+ Cu(NO3)2(aq)→ Pb(NO3)2(aq)+ Cu(s)

A)Pb(s)∣ Pb2+(aq)∣∣ Cu2+(aq)∣ Cu(s)
B)Cu(s)∣ Cu2+(aq)∣∣ Pb2+(aq)∣ Pb(s)
C)Pb(s)∣ NO3-(aq)∣∣ NO3-(aq)∣ Cu(s)
D)Cu(s)∣ Cu(NO3)2(aq)∣∣ Pb(NO3)2(aq)∣ Pb(s)
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65
What mass of aluminum can be plated onto an object in 755 minutes at 5.80 A of current?

A)73.5 g
B)24.5 g
C)220.g
D)147 g
E)8.17 g
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66
Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C.
Al(s)∣ Al3+(aq,0.115 M)∣∣ Al3+(aq,3.89 M)∣ Al(s)
<strong>Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C. Al(s)∣ Al<sup>3+</sup>(aq,0.115 M)∣∣ Al<sup>3+</sup>(aq,3.89 M)∣ Al(s)  </strong> A)1.66 V B)0.060 V C)0.00 V D)0.090 V E)0.030 V

A)1.66 V
B)0.060 V
C)0.00 V
D)0.090 V
E)0.030 V
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67
Explain the significance of the standard hydrogen electrode (SHE)in the tabulation of standard reduction potentials of other species.
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68
What is the reduction half-reaction for the following overall galvanic cell reaction?
Zn2+(aq)+ 2 Ag(s)→ Zn(s)+ 2 Ag+(aq)

A)Ag(s)+ e- → Ag+(aq)
B)Ag+(aq)+ e- → Ag(s)
C)Zn2+(aq)+ 2 e- → Zn(s)
D)Zn2+(aq)+ e- → Zn(s)
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69
Match the following.
Q = 1

A)Ecell = E°cell
B)Ecell = 0
C)E°cell < 0
D)Ecell < 0
E)E°cell > 0
F)Ecell > 0
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70
Match the following.
Q < K

A)Ecell = E°cell
B)Ecell = 0
C)E°cell < 0
D)Ecell < 0
E)E°cell > 0
F)Ecell > 0
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71
Match the following.
ΔG° > 0

A)Ecell = E°cell
B)Ecell = 0
C)E°cell < 0
D)Ecell < 0
E)E°cell > 0
F)Ecell > 0
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72
Why,if we multiply a reaction by 2,don't we multiply its E°red by 2?
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73
Give the type of battery that most cars contain.

A)lead-acid battery
B)dry-cell battery
C)alkaline battery
D)nickel-cadmium battery
E)nickel-metal hydride battery
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74
What is the difference between a voltaic cell and an electrolytic cell?
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75
Match the following.
ΔG° < 0

A)Ecell = E°cell
B)Ecell = 0
C)E°cell < 0
D)Ecell < 0
E)E°cell > 0
F)Ecell > 0
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76
Nickel can be plated from aqueous solution according to the following half reaction.How long would it take (in minutes)to plate 29.6 g of nickel at 4.7 A?
Ni2+(aq)+ 2 e⁻ → Ni(s)

A)1.7 × 102 minutes
B)5.9 × 102 minutes
C)3.5 × 102 minutes
D)4.8 × 102 minutes
E)6.2 × 102 minutes
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77
Match the following.
Q = K

A)Ecell = E°cell
B)Ecell = 0
C)E°cell < 0
D)Ecell < 0
E)E°cell > 0
F)Ecell > 0
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78
Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C.
Cu(s)∣ Cu2+(aq,0.0032 M)∣∣ Cu2+(aq,4.48 M)∣ Cu(s)
<strong>Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C. Cu(s)∣ Cu<sup>2+</sup>(aq,0.0032 M)∣∣ Cu<sup>2+</sup>(aq,4.48 M)∣ Cu(s)  </strong> A)0.00 V B)0.093 V C)0.34 V D)0.186 V E)0.052 V

A)0.00 V
B)0.093 V
C)0.34 V
D)0.186 V
E)0.052 V
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79
What mass of silver can be plated onto an object in 33.5 minutes at 8.70 A of current?
Ag⁺(aq)+ e⁻ → Ag(s)

A)19.6 g
B)0.326 g
C)9.78 g
D)3.07 g
E)0.102 g
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80
Why are iron nails coated with zinc?
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