Question 1

What is the cell reaction for the following electrochemical cell? Cu | Cu²⁺(aq)|| Mn²⁺(aq)| Mn

Accepted Answer

The strongest oxidizing agent in this reaction is Mn, so it will pull electrons from the copper, causing it to oxidize to Cu2+ and form Cu²⁺(aq). The Mn will be reduced and form Mn²⁺(aq). Therefore, the overall reaction is Cu(s) + Mn²⁺(aq) → Mn(s) + Cu²⁺(aq).

Question 2

For a galvanic cell using Fe | Fe²⁺(1.0 M)and Pb | Pb²⁺(1.0 M)half-cells,which of the following statements is correct? Fe²⁺(aq)+ 2e^- → Fe(s); E° = -0.41 V Pb²⁺(aq)+ 2e^- → Pb(s); E° = -0.13 V

Accepted Answer

The concentration of Pb²⁺ decreases during discharge because Pb²⁺ is reduced to Pb at the cathode.

Question 3

In the following electrochemical cell,what is the role of the platinum? Cu(s)| Cu²⁺(aq)|| Fe³⁺(aq),Fe²⁺(aq)| Pt(s)

Accepted Answer

The platinum serves as a catalytic surface where the reduction of Fe³⁺ takes place, as it facilitates the transfer of electrons between the Fe³⁺ ions and the electrode. The oxidation of Fe²⁺ occurs at the electrode made of iron. The copper electrode served as a reference electrode. Therefore, the correct choice is C, as platinum reduces Fe³⁺.

Question 4

What is the correct cell notation for a cell in which the hydrogen electrode is the anode and the cathode half-reaction is Ce⁴⁺(aq)+ e− → Ce³⁺(aq).

Accepted Answer

The correct cell notation follows the format: anode | anode solution || cathode solution | cathode The given half-reactions can be combined to form the overall reaction: Ce⁴⁺(aq) + H⁺(aq) → Ce³⁺(aq) + H2S(g) Since the hydrogen electrode is the anode, it is represented as Pt(s)| H2(g) | H₂(g)| H⁺(aq). The cathode half-reaction is Ce⁴⁺(aq)+ e− → Ce³⁺(aq), so it is represented as Ce⁴⁺(aq),Ce³⁺(aq)| Pt(s). Putting this all together results in choice A.

Question 5

What is the SI unit of potential difference?

Accepted Answer

The SI unit of potential difference is volt, which is the amount of electric potential energy per unit charge.

Question 6

Given: Mn²⁺(aq)+ 2e^- Mn(s); E° = -1.18 V Cu²⁺(aq)+ 2e^- Cu(s); E° = 0.34 V Cr₂O₇^2-(aq)+ 14H⁺(aq)+ 6e^- 2Cr³⁺(aq)+ 7H₂O(l); E° = 1.33 V Which of the following species is the strongest reducing agent?

Accepted Answer

The species with the most negative E° value is the strongest reducing agent, as it will have the greatest tendency to lose electrons and undergo oxidation. In this case, Mn has the most negative E° value (-1.18 V), making it the strongest reducing agent among the given choices.

Question 7

The cell potential of an electrochemical cell with the cell reaction Al(s)+ Cr³⁺(aq)→ Cr(s)+ Al³⁺(aq) Is 1.63 V.What is the maximum electrical work obtainable from this cell when 0.50 g of Al is consumed?

Accepted Answer

The answer of The cell potential of an electrochemical cell...

Question 8

In the following electrochemical cell,what is the reduction half reaction? Mn(s)| Mn²⁺(aq)|| Fe³⁺(aq),Fe²⁺(aq)| Pt(s)

Accepted Answer

The reduction half-reaction involves the gain of electrons. In this cell, Fe³⁺ is reduced to Fe²⁺ by gaining an electron.

Question 9

A fuel cell designed to react grain alcohol with oxygen has the following net reaction: C₂H₅OH(l)+ 3O₂(g)→ 2CO₂(g)+ 3H₂O(l) The maximum work that 1 mol of alcohol can yield by this process is 1320 kJ.What is the theoretical maximum voltage that this cell can achieve?

Accepted Answer

The maximum work that 1 mol of alcohol can yield by this process is 1320 kJ. The theoretical maximum voltage that this cell can achieve is:E = W/nFwhere E is the voltage, W is the work, n is the number of moles of electrons transferred, and F is the Faraday constant (96,485 C/mol).In this case, n = 12 (because 12 electrons are transferred in the reaction) and W = 1320 kJ = 1320000 J. Therefore,E = 1320000 J / (12 mol * 96485 C/mol) = 1.14 VSo the correct answer is A) 1.14 V.

Question 10

What is the cell reaction for the following electrochemical cell? Zn | Zn²⁺(aq)|| Sc³⁺(aq)| Sc

Accepted Answer

The correct answer is A because the cell reaction is the spontaneous reaction that occurs when the cell is connected. The anode is the electrode where oxidation occurs, and the cathode is the electrode where reduction occurs. In this case, Zn is oxidized to Zn2+, and Sc3+ is reduced to Sc. The overall reaction is:3Zn(s) + 2Sc3+(aq) → 2Sc(s) + 3Zn2+(aq)

Question 11

The cell potential of an electrochemical cell with the cell reaction 2Al(s)+ 3Zn²⁺(aq)→ 3Zn(s)+ 2Al³⁺(aq) Is 1.607 V.What is the maximum electrical work obtainable from this cell when 2.0 mol of Al is consumed?

Accepted Answer

The answer of The cell potential of an electrochemical cell...

Question 12

What is the balanced spontaneous reaction and standard cell potential of an electrochemical cell constructed from half cells with the following half reactions? Cu²⁺(aq)+ 2e¯ → Cu(s)E° = 0.337 V E° = -0.130 V

Accepted Answer

The answer of What is the balanced spontaneous reaction and...

Question 13

Given: Zn²⁺(aq)+ 2e^- Zn(s); E° = -0.76 V Cu²⁺(aq)+ 2e^- Cu(s); E° = 0.34 V Cr₂O₇^2-(aq)+ 14H⁺(aq)+ 6e^- 2Cr³⁺(aq)+ 7H₂O(l); E° = 1.33 V Which of the following species is the strongest oxidizing agent?

Accepted Answer

The strongest oxidizing agent is the species with the highest positive standard reduction potential (E°) value, as it has the greatest tendency to accept electrons and undergo reduction. Among the given species, Cr₂O₇^2- has the highest positive E° value of 1.33 V, indicating that it has the strongest oxidizing power.

Question 14

What is the cell notation for the voltaic cell shown below?

Accepted Answer

The answer of What is the cell notation for the...

Question 15

Consider the following standard electrode potentials: Ag⁺(aq)+ e^- Ag(s); E° = 0.80 V Mn²⁺(aq)+ 2e^- Mn(s); E° = -1.18 V Which of the following statements is false concerning the electrochemical cell given below? Mn(s)| Mn²⁺(aq)|| Ag⁺(aq)| Ag(s)

Accepted Answer

The answer of Consider the following standard electrode potentials: Ag⁺(aq)+ e^-...

Question 16

What is the cell reaction for the following electrochemical cell? Pt | Fe²⁺(aq),Fe³⁺(aq)|| Cr³⁺(aq)| Cr

Accepted Answer

The correct cell reaction involves the reduction of Fe^3+ to Fe^2+ at the cathode and the oxidation of Cr to Cr^3+ at the anode. This is represented by option A, where 3 Fe^2+ ions are oxidized to Fe^3+ ions, and Cr metal is oxidized to Cr^3+ ions.

Question 17

What is the cell reaction for the following voltaic cell? Cr(s)| Cr³⁺(aq)|| Br^-(aq)| Br₂(g)| Pt(s)

Accepted Answer

The answer of What is the cell reaction for the...

Question 18

A zinc-copper voltaic cell is represented as follows: Zn(s)| Zn²⁺(1.0 M)|| Cu²⁺(1.0 M)| Cu(s) Which of the following statements is false?

Accepted Answer

The anode is where oxidation occurs. In the given cell, zinc electrode is oxidized to Zn2+ ions and electrons. Therefore, the zinc electrode is the anode, not the copper electrode.

Question 19

In a table of standard reduction potentials,the strongest reducing agents are the _______ species in the half-reactions with the _______ E° values.

Accepted Answer

The strongest reducing agents are those that most readily lose electrons, which corresponds to the reduced species in the half-reactions with the most negative E° values. This is because a more negative E° value indicates a greater tendency to donate electrons (undergo oxidation).

Question 20

The Faraday constant is defined as

Accepted Answer

The Faraday constant is defined as the electric charge per mole of electrons involved in the reaction, and is equal to approximately 96,485.3329 coulombs per mole.

Quiz 19: Electrochemistry

What is the cell reaction for the following electrochemical cell? Cu | Cu²⁺(aq) || Mn²⁺(aq) | Mn

For a galvanic cell using Fe | Fe²⁺(1.0 M) and Pb | Pb²⁺(1.0 M) half-cells,which of the following statements is correct? Fe²⁺(aq) + 2e^- → Fe(s) ; E° = -0.41 V Pb²⁺(aq) + 2e^- → Pb(s) ; E° = -0.13 V

In the following electrochemical cell,what is the role of the platinum? Cu(s) | Cu²⁺(aq) || Fe³⁺(aq) ,Fe²⁺(aq) | Pt(s)

What is the correct cell notation for a cell in which the hydrogen electrode is the anode and the cathode half-reaction is Ce⁴⁺(aq) + e− → Ce³⁺(aq) .

What is the SI unit of potential difference?

Given: Mn²⁺(aq) + 2e^- Mn(s) ; E° = -1.18 V Cu²⁺(aq) + 2e^- Cu(s) ; E° = 0.34 V Cr₂O₇^2-(aq) + 14H⁺(aq) + 6e^- 2Cr³⁺(aq) + 7H₂O(l) ; E° = 1.33 V Which of the following species is the strongest reducing agent?

The cell potential of an electrochemical cell with the cell reaction Al(s) + Cr³⁺(aq) → Cr(s) + Al³⁺(aq) Is 1.63 V.What is the maximum electrical work obtainable from this cell when 0.50 g of Al is consumed?

In the following electrochemical cell,what is the reduction half reaction? Mn(s) | Mn²⁺(aq) || Fe³⁺(aq) ,Fe²⁺(aq) | Pt(s)

A fuel cell designed to react grain alcohol with oxygen has the following net reaction: C₂H₅OH(l) + 3O₂(g) → 2CO₂(g) + 3H₂O(l) The maximum work that 1 mol of alcohol can yield by this process is 1320 kJ.What is the theoretical maximum voltage that this cell can achieve?

What is the cell reaction for the following electrochemical cell? Zn | Zn²⁺(aq) || Sc³⁺(aq) | Sc

The cell potential of an electrochemical cell with the cell reaction 2Al(s) + 3Zn²⁺(aq) → 3Zn(s) + 2Al³⁺(aq) Is 1.607 V.What is the maximum electrical work obtainable from this cell when 2.0 mol of Al is consumed?

What is the balanced spontaneous reaction and standard cell potential of an electrochemical cell constructed from half cells with the following half reactions? Cu²⁺(aq) + 2e¯ → Cu(s) E° = 0.337 V E° = -0.130 V

Given: Zn²⁺(aq) + 2e^- Zn(s) ; E° = -0.76 V Cu²⁺(aq) + 2e^- Cu(s) ; E° = 0.34 V Cr₂O₇^2-(aq) + 14H⁺(aq) + 6e^- 2Cr³⁺(aq) + 7H₂O(l) ; E° = 1.33 V Which of the following species is the strongest oxidizing agent?

What is the cell notation for the voltaic cell shown below?

Consider the following standard electrode potentials: Ag⁺(aq) + e^- Ag(s) ; E° = 0.80 V Mn²⁺(aq) + 2e^- Mn(s) ; E° = -1.18 V Which of the following statements is false concerning the electrochemical cell given below? Mn(s) | Mn²⁺(aq) || Ag⁺(aq) | Ag(s)

What is the cell reaction for the following electrochemical cell? Pt | Fe²⁺(aq) ,Fe³⁺(aq) || Cr³⁺(aq) | Cr

What is the cell reaction for the following voltaic cell? Cr(s) | Cr³⁺(aq) || Br^-(aq) | Br₂(g) | Pt(s)

A zinc-copper voltaic cell is represented as follows: Zn(s) | Zn²⁺(1.0 M) || Cu²⁺(1.0 M) | Cu(s) Which of the following statements is false?

In a table of standard reduction potentials,the strongest reducing agents are the _ species in the half-reactions with the _ E° values.

The Faraday constant is defined as

Quiz 19: Electrochemistry

What is the cell reaction for the following electrochemical cell? Cu | Cu2+(aq) || Mn2+(aq) | Mn

For a galvanic cell using Fe | Fe2+(1.0 M) and Pb | Pb2+(1.0 M) half-cells,which of the following statements is correct? Fe2+(aq) + 2e- → Fe(s) ; E° = -0.41 V Pb2+(aq) + 2e- → Pb(s) ; E° = -0.13 V

In the following electrochemical cell,what is the role of the platinum? Cu(s) | Cu2+(aq) || Fe3+(aq) ,Fe2+(aq) | Pt(s)

What is the correct cell notation for a cell in which the hydrogen electrode is the anode and the cathode half-reaction is Ce4+(aq) + e− → Ce3+(aq) .

What is the SI unit of potential difference?

Given: Mn2+(aq) + 2e- Mn(s) ; E° = -1.18 V Cu2+(aq) + 2e- Cu(s) ; E° = 0.34 V Cr2O72-(aq) + 14H+(aq) + 6e- 2Cr3+(aq) + 7H2O(l) ; E° = 1.33 V Which of the following species is the strongest reducing agent?

The cell potential of an electrochemical cell with the cell reaction Al(s) + Cr3+(aq) → Cr(s) + Al3+(aq) Is 1.63 V.What is the maximum electrical work obtainable from this cell when 0.50 g of Al is consumed?

In the following electrochemical cell,what is the reduction half reaction? Mn(s) | Mn2+(aq) || Fe3+(aq) ,Fe2+(aq) | Pt(s)

A fuel cell designed to react grain alcohol with oxygen has the following net reaction: C2H5OH(l) + 3O2(g) → 2CO2(g) + 3H2O(l) The maximum work that 1 mol of alcohol can yield by this process is 1320 kJ.What is the theoretical maximum voltage that this cell can achieve?

What is the cell reaction for the following electrochemical cell? Zn | Zn2+(aq) || Sc3+(aq) | Sc

The cell potential of an electrochemical cell with the cell reaction 2Al(s) + 3Zn2+(aq) → 3Zn(s) + 2Al3+(aq) Is 1.607 V.What is the maximum electrical work obtainable from this cell when 2.0 mol of Al is consumed?

What is the balanced spontaneous reaction and standard cell potential of an electrochemical cell constructed from half cells with the following half reactions? Cu2+(aq​) + 2e¯ → Cu(s) E° = 0.337 V E° = -0.130 V

Given: Zn2+(aq) + 2e- Zn(s) ; E° = -0.76 V Cu2+(aq) + 2e- Cu(s) ; E° = 0.34 V Cr2O72-(aq) + 14H+(aq) + 6e- 2Cr3+(aq) + 7H2O(l) ; E° = 1.33 V Which of the following species is the strongest oxidizing agent?

What is the cell notation for the voltaic cell shown below?

Consider the following standard electrode potentials: Ag+(aq) + e- Ag(s) ; E° = 0.80 V Mn2+(aq) + 2e- Mn(s) ; E° = -1.18 V Which of the following statements is false concerning the electrochemical cell given below? Mn(s) | Mn2+(aq) || Ag+(aq) | Ag(s)

What is the cell reaction for the following electrochemical cell? Pt | Fe2+(aq) ,Fe3+(aq) || Cr3+(aq) | Cr

What is the cell reaction for the following voltaic cell? Cr(s) | Cr3+(aq) || Br-(aq) | Br2(g) | Pt(s)

A zinc-copper voltaic cell is represented as follows: Zn(s) | Zn2+(1.0 M) || Cu2+(1.0 M) | Cu(s) Which of the following statements is false?

In a table of standard reduction potentials,the strongest reducing agents are the _______ species in the half-reactions with the _______ E° values.

The Faraday constant is defined as

What is the cell reaction for the following electrochemical cell? Cu | Cu²⁺(aq) || Mn²⁺(aq) | Mn

For a galvanic cell using Fe | Fe²⁺(1.0 M) and Pb | Pb²⁺(1.0 M) half-cells,which of the following statements is correct? Fe²⁺(aq) + 2e^- → Fe(s) ; E° = -0.41 V Pb²⁺(aq) + 2e^- → Pb(s) ; E° = -0.13 V

In the following electrochemical cell,what is the role of the platinum? Cu(s) | Cu²⁺(aq) || Fe³⁺(aq) ,Fe²⁺(aq) | Pt(s)

What is the correct cell notation for a cell in which the hydrogen electrode is the anode and the cathode half-reaction is Ce⁴⁺(aq) + e− → Ce³⁺(aq) .

Given: Mn²⁺(aq) + 2e^- Mn(s) ; E° = -1.18 V Cu²⁺(aq) + 2e^- Cu(s) ; E° = 0.34 V Cr₂O₇^2-(aq) + 14H⁺(aq) + 6e^- 2Cr³⁺(aq) + 7H₂O(l) ; E° = 1.33 V Which of the following species is the strongest reducing agent?

The cell potential of an electrochemical cell with the cell reaction Al(s) + Cr³⁺(aq) → Cr(s) + Al³⁺(aq) Is 1.63 V.What is the maximum electrical work obtainable from this cell when 0.50 g of Al is consumed?

In the following electrochemical cell,what is the reduction half reaction? Mn(s) | Mn²⁺(aq) || Fe³⁺(aq) ,Fe²⁺(aq) | Pt(s)

A fuel cell designed to react grain alcohol with oxygen has the following net reaction: C₂H₅OH(l) + 3O₂(g) → 2CO₂(g) + 3H₂O(l) The maximum work that 1 mol of alcohol can yield by this process is 1320 kJ.What is the theoretical maximum voltage that this cell can achieve?

What is the cell reaction for the following electrochemical cell? Zn | Zn²⁺(aq) || Sc³⁺(aq) | Sc

The cell potential of an electrochemical cell with the cell reaction 2Al(s) + 3Zn²⁺(aq) → 3Zn(s) + 2Al³⁺(aq) Is 1.607 V.What is the maximum electrical work obtainable from this cell when 2.0 mol of Al is consumed?

What is the balanced spontaneous reaction and standard cell potential of an electrochemical cell constructed from half cells with the following half reactions? Cu²⁺(aq) + 2e¯ → Cu(s) E° = 0.337 V E° = -0.130 V

Given: Zn²⁺(aq) + 2e^- Zn(s) ; E° = -0.76 V Cu²⁺(aq) + 2e^- Cu(s) ; E° = 0.34 V Cr₂O₇^2-(aq) + 14H⁺(aq) + 6e^- 2Cr³⁺(aq) + 7H₂O(l) ; E° = 1.33 V Which of the following species is the strongest oxidizing agent?

Consider the following standard electrode potentials: Ag⁺(aq) + e^- Ag(s) ; E° = 0.80 V Mn²⁺(aq) + 2e^- Mn(s) ; E° = -1.18 V Which of the following statements is false concerning the electrochemical cell given below? Mn(s) | Mn²⁺(aq) || Ag⁺(aq) | Ag(s)

What is the cell reaction for the following electrochemical cell? Pt | Fe²⁺(aq) ,Fe³⁺(aq) || Cr³⁺(aq) | Cr

What is the cell reaction for the following voltaic cell? Cr(s) | Cr³⁺(aq) || Br^-(aq) | Br₂(g) | Pt(s)

A zinc-copper voltaic cell is represented as follows: Zn(s) | Zn²⁺(1.0 M) || Cu²⁺(1.0 M) | Cu(s) Which of the following statements is false?

In a table of standard reduction potentials,the strongest reducing agents are the _ species in the half-reactions with the _ E° values.