Deck 4: Reactions in Aqueous Solution

Question 1

Based on the solubility rules, which one of the following compounds should be insoluble in water?

A)NaCl
B)MgBr₂
C)FeCl₂
D)AgBr
E)ZnCl₂

Answer 1

AgBr

Question 2

Which of the following compounds is a strong electrolyte?

A)H₂O
B)CH₃OH
C)CH₃CH₂OH
D)HF
E)NaF

Answer 2

NaF

Question 3

Based on the solubility rules, which one of the following should be soluble in water?

A)Hg₂Cl₂
B)Na₂S
C)Ag₂CO₃
D)Ag₂S
E)BaSO₄

Answer 3

Na₂S

Question 4

Based on the solubility rules, which one of the following should be soluble in water?

A)AgBr
B)AgCl
C)Ag₂CO₃
D)AgNO₃
E)Ag₂S

Question 5

Based on the solubility rules, which of the following will occur when solutions of ZnSO₄(aq)and MgCl₂(aq)are mixed?

A)ZnCl₂ will precipitate; Mg²⁺ and SO₄^2- will be spectator ions.
B)ZnSO₄ will precipitate; Mg²⁺ and Cl^- will be spectator ions.
C)MgSO₄ will precipitate; Zn²⁺ and Cl^- will be spectator ions.
D)MgCl₂ will precipitate; Zn²⁺ and SO₄^2- will be spectator ions.
E)No precipitate will form.

Question 6

Which of the following compounds is a weak electrolyte?

A)HNO₃
B)NaNO₃
C)HNO₂
D)NaNO₂
E)NaOH

Question 7

Which of the following compounds is a nonelectrolyte?

A)NaF
B)HNO₃
C)CH₃COOH (acetic acid)
D)NaOH
E)C₆H₁₂O₆ (glucose)

Question 8

The distinguishing characteristic of all electrolyte solutions is that they

A)contain molecules.
B)conduct electricity.
C)react with other solutions.
D)always contain acids.
E)conduct heat.

Question 9

Identify the major ionic species present in an aqueous solution of Na₂CO₃.

A)Na₂⁺, CO₃^2-
B)Na₂⁺, C^{2 -}, O₃
C)Na⁺, C⁴⁺, O₃^2-
D)Na⁺, C⁺, O^2-
E)Na⁺, CO₃^2-

Question 10

Based on the solubility rules, which one of the following should be soluble in water?

A)CaSO₄
B)BaSO₄
C)PbSO₄
D)K₂SO₄
E)AgCl

Question 11

Based on the solubility rules, which one of the following compounds should be insoluble in water?

A)CaCO₃
B)(NH₄)₂CO₃
C)Na₂CO₃
D)K₂CO₃
E)KNO₃

Question 12

Based on the solubility rules, which one of the following compounds should be insoluble in water?

A)Na₂SO₄
B)BaSO₄
C)CuSO₄
D)MgSO₄
E)Rb₂SO₄

Question 13

Identify the major ionic species present in an aqueous solution of K₂SO₄.

A)K²⁺, S⁶⁺, O₄^8-
B)K²⁺, S⁶⁺, 4O^2-
C)2K⁺, S⁶⁺, O₄^8-
D)2K⁺, S⁶⁺, 4O^2-
E)2K⁺, SO₄^2-

Question 14

Based on the solubility rules, which one of the following should be soluble in water?

A)(NH₄)₃PO₄
B)Ca₃(PO₄)₂
C)AlPO₄
D)Ag₃PO₄
E)Mg₃(PO₄)₂

Question 15

Based on the solubility rules, which of the following will occur if solutions of CuSO₄(aq)and BaCl₂(aq)are mixed?

A)CuCl₂ will precipitate; Ba²⁺ and SO₄^{2 -} are spectator ions.
B)CuSO₄ will precipitate; Ba²⁺ and Cl ^- are spectator ions.
C)BaSO₄ will precipitate; Cu²⁺ and Cl^- are spectator ions.
D)BaCl₂ will precipitate; Cu²⁺ and SO₄^{2 -} are spectator ions.
E)No precipitate will form.

Question 16

Which of the following compounds is a nonelectrolyte?

A)NaOH
B)HNO₃
C)C₂H₆O (ethanol)
D)KF
E)CH₃COOH (acetic acid)

Question 17

Which of the following compounds is a weak electrolyte?

A)HCl
B)CH₃COOH (acetic acid)
C)C₆H₁₂O₆ (glucose)
D)O₂
E)NaCl

Question 18

Based on the solubility rules, which of the following will occur when a solution containing about 0.1 g of Pb(NO₃)₂(aq)is mixed with a solution containing 0.1 g of KI(aq)/100 mL?

A)KNO₃ will precipitate; Pb²⁺ and I^- are spectator ions.
B)No precipitate will form.
C)Pb(NO₃)₂ will precipitate; K⁺ and I^- are spectator ions.
D)PbI₂ will precipitate; K⁺ and NO₃^- are spectator ions.
E)Pb²⁺ and I^- are spectator ions, and PbI₂ will precipitate.

Question 19

Which of the following compounds is a weak electrolyte?

A)HCl
B)NH₃
C)C₆H₁₂O₆ (glucose)
D)N₂
E)KCl

Question 20

Which of the following compounds is a strong electrolyte?

A)H₂O
B)N₂
C)CH₃COOH (acetic acid)
D)CH₃CH₂OH (ethanol)
E)KOH

Question 21

The oxidation number of Mn in KMnO₄ is

A)+8.
B)+7.
C)+5.
D)-7.
E)-8.

Question 22

The oxidation number of Cr in Cr₂O₇^2- is

A)-12.
B)-7.
C)-2.
D)+6.
E)+7.

Question 23

For which one of the following acids is chlorine in the +5 oxidation state?

A)HCl
B)HClO
C)HClO₂
D)HClO₃
E)HClO₄

Question 24

The oxidation number of Fe in K₃Fe(CN)₆ is

A)+3.
B)+2.
C)+1.
D)-3.
E)-4.

Question 25

What is the chemical formula of the salt produced by the neutralization of hydrobromic acid with magnesium hydroxide?

A)MgBr
B)Mg₂Br₃
C)Mg₃Br₂
D)Mg₂Br
E)MgBr₂

Question 26

What is the chemical formula of the salt produced by the complete neutralization of sodium hydroxide with sulfuric acid?

A)Na₂SO₄
B)Na₂(SO₄)₃
C)Na(SO₄)₂
D)NaSO₃
E)Na₃SO₄

Question 27

What is the correct formula of the salt formed in the neutralization reaction of hydrochloric acid with calcium hydroxide?

A)CaO
B)CaCl₂
C)CaH₂
D)CaCl
E)CaClH

Question 28

Which of the following compounds is a weak acid?

A)HF
B)HCl
C)HBr
D)HI
E)HClO₄

Question 29

The oxidation number of N in NaNO₃ is

A)+6.
B)+5.
C)+3.
D)-3.
E)None of the above.

Question 30

What is the chemical formula of the salt produced by the neutralization of potassium hydroxide with sulfuric acid?

A)KSO₃
B)K₂(SO₄)₃
C)K₂SO₄
D)K(SO₄)₂
E)KSO₄

Question 31

The highest possible oxidation number of nitrogen is

A)+8.
B)+5.
C)+3.
D)+1.
E)-3.

Question 32

Identify the major ionic species present in an aqueous solution of H₂SO₄.

A)S⁶⁺, O₃^6- (plus H₂O as a neutral species)
B)H⁺, OH^-, S⁶⁺, 3O^2-
C)2H⁺, S⁶⁺, 4O^2-
D)H⁺, HSO₄^-
E)2H⁺, SO₄^2-

Question 33

Which of the following is the correct net ionic equation for the reaction that occurs when solutions of Pb(NO₃)₂ and NH₄Cl are mixed?

A)Pb(NO₃)₂(aq)+ 2NH₄Cl(aq) $\rarr$ NH₄NO₃(aq)+ PbCl₂(s)
B)Pb²⁺(aq)+ 2Cl^-(aq) $\rarr$ PbCl₂(s)
C)Pb²⁺(aq)+ 2NO₃^- (aq)+ 2NH (aq)+ 2Cl^-(aq) $\rarr$ 2NH (aq)+ 2NO₃^- (aq)+ PbCl₂(s)
D)NH₄⁺(aq)+ NO₃^- (aq) $\rarr$ 2NH₄NO₃(s)
E)No reaction occurs when the solutions are mixed.

Question 34

Identify the major ions present in an aqueous LiOH solution.

A)Li²⁺, O^- , H^-
B)Li⁺, OH^-
C)LiO^-, H⁺
D)Li⁺, O^2- , H⁺
E)Li^- , OH⁺

Question 35

The oxidation number of S in K₂SO₄ is

A)+6.
B)+4.
C)+2.
D)-1.
E)None of the above.

Question 36

The oxidation number of Cl in ClO₃^- is

A)-1.
B)+7.
C)+5.
D)+3.
E)None of the above.

Question 37

What is the chemical formula of the salt produced by the neutralization of nitric acid with calcium hydroxide?

A)CaNO₃
B)Ca₂(NO₃)₃
C)Ca₃(NO₃)₂
D)Ca₂NO₃
E)Ca(NO₃)₂

Question 38

The oxidation number of Cl in ClO₄^- is

A)-1.
B)+1.
C)+3.
D)+5.
E)None of the above.

Question 39

Identify the major ions present in an aqueous HNO₃ solution.

A)HN⁺, O^2-
B)OH^- , NO₃^-
C)OH^- , NO
D)H⁺, N^3-, O^2-
E)H⁺, NO₃^-

Question 40

The common constituent in all acid solutions is

A)H₂.
B)H⁺.
C)OH^-.
D)H₂SO₄.
E)Cl^-.

Question 41

Select the compound in which sulfur has its highest possible oxidation number.

A)H₂S
B)SO₂
C)SCl₂
D)H₂SO₃
E)Na₂SO₄

Question 42

What element is reduced in the following chemical reaction?
Cu + 2H₂SO₄ $\rarr$ CuSO₄ + SO₂ + 2H₂O

A)Cu
B)H
C)S
D)O
E)H₂O

Question 43

The highest possible oxidation number of carbon is

A)+8.
B)+6.
C)+4.
D)+2.
E)-4.

Question 44

In the following chemical reaction the oxidizing agent is:
5S + 6KNO₃ + 2CaCO₃ $\rarr$ 3K₂SO₄ + 2CaSO₄ + CO₂ + 3N₂

A)S
B)N₂
C)KNO₃
D)CaSO₄
E)CaCO₃

Question 45

The oxidation number of N in N₂H₄ is

A)+4.
B)-4.
C)+2.
D)-2.
E)0.

Question 46

Which of the following is an example of a disproportionation reaction?

A)2C₂H₆(g)+ 7O₂(g) $\rarr$ 4CO₂(g)+ 6H₂O(l)
B)2KBr(aq)+ Cl₂(g) $\rarr$ 2KCl(aq)+ Br₂(l)
C)2H₂O₂(aq) $\rarr$ 2H₂O(l)+ O₂(g)
D)CaBr₂(aq)+ H₂SO₄(aq) $\rarr$ CaSO₄(s)+ 2HBr(g)
E)2Al(s)+ 3H₂SO₄(aq) $\rarr$ Al₂(SO₄)₃(aq)+ 3H₂(g)

Question 47

What element is oxidized in the following chemical reaction?
H₂SO₄ + Cd(OH)₂ $\rarr$ 2H₂O + CdSO₄

A)H
B)S
C)O
D)Cd
E)this is not a redox reaction

Question 48

Which of the following equations does not represent an oxidation-reduction reaction?

A)3Al + 6HCl $\rarr$ 3H₂ + AlCl₃
B)2H₂O $\rarr$ 2H₂ + O₂
C)2NaCl + Pb(NO₃)₂ $\rarr$ PbCl₂ + 3NaNO₃
D)2NaI + Br₂ $\rarr$ 2NaBr + I₂
E)Cu(NO₃)₂ + Zn $\rarr$ Zn(NO₃)₂ + Cu

Question 49

Identify the oxidizing agent in the following chemical reaction.
2MnO₄^- + 5H₂SO₃ $\rarr$ 2Mn²⁺ + 5SO₄^2- + 4H⁺ + 3H₂O

A)MnO₄^-
B)H₂SO₃
C)Mn²⁺
D)SO₄^2-
E)H⁺

Question 50

In the following chemical reaction the oxidizing agent is:
5H₂O₂ + 2MnO₄^- + 6H⁺ $\rarr$ 2Mn²⁺ + 8H₂O + 5O₂

A)H₂O₂
B)MnO₄^-
C)H⁺
D)Mn²⁺
E)O₂

Question 51

What element is oxidized in the following chemical reaction?
NiO₂ + Cd + 2H₂O $\rarr$ Ni(OH)₂ + Cd(OH)₂

A)Ni
B)Cd
C)O
D)H
E)This is not a redox reaction.

Question 52

In the following redox reaction 4NH₃ + 3Ca(ClO)₂ $\rarr$ 2N₂ + 6H₂O + 3CaCl₂
Which element is oxidized and which is reduced?

A)H is oxidized and N is reduced
B)N is oxidized and Cl is reduced
C)N is oxidized and O is reduced
D)Cl is oxidized and O is reduced
E)Cl is oxidized and N is reduced

Question 53

Which choice gives the correct oxidation numbers for all three elements in Ca(ClO)₂ in the order that the elements are shown in the formula?

A)+2, +1, -2
B)+2, -2, +1
C)+2, -3, +2
D)-2, +2, -1
E)-2, +3, -2

Question 54

Identify the elements that are oxidized and reduced in the following reaction. KClO₃(aq)+ 6HBr(aq) $\rarr$ KCl(aq)+ 3Br₂(l)+ 3H₂O(l)

A)Br is oxidized and Cl is reduced
B)Cl is oxidized and H is reduced
C)H is oxidized and O is reduced
D)O is oxidized and Cl is reduced
E)Cl is oxidized and Br is reduced

Question 55

Predict the products of the following single replacement reaction.
Fe(s)+ CuSO₄(aq) $\rarr$

A)Cu(s)+ FeSO₄(aq)
B)Fe(s)+ Cu(s)+ SO₄(aq)
C)CuS(s)+ Fe₂SO₄(aq)
D)FeCuSO₄(aq)
E)FeO(s)+ CuSO₃(aq)

Question 56

Which one of the following is a redox reaction?

A)2Al(s)+ 3H₂SO₄(aq) $\rarr$ Al₂(SO₄)₃(aq)+ 3H₂(g)
B)2KBr(aq)+ Pb(NO₃)₂(aq) $\rarr$ 2KNO₃(aq)+ PbBr₂(s)
C)CaBr₂(aq)+ H₂SO₄(aq) $\rarr$ CaSO₄(s)+ 2HBr(g)
D)H⁺(aq)+ OH^- (aq) $\rarr$ H₂O(l)
E)CO₃^2- (aq)+ HSO₄^-(aq) $\rarr$ HCO₃^- (aq)+ SO₄^2- (aq)

Question 57

What element is oxidized in the following chemical reaction?
3Cu + 8HNO₃ $\rarr$ 3Cu(NO₃)₂ + 2NO + 4H₂O

A)Cu
B)H
C)N
D)O
E)H₂O

Question 58

Identify the reducing agent in the following chemical reaction.
Cd + NiO₂ + 2H₂O $\rarr$ Cd(OH)₂ + Ni(OH)₂

A)Cd
B)NiO₂
C)H₂O
D)Cd(OH)₂
E)Ni(OH)₂

Question 59

Which choice gives the correct oxidation numbers for all three elements in Rb₂SO₃ in the order that the elements are shown in the formula?

A)-2, +6, -2
B)-1, +4, -3
C)+2, +4, -2
D)+1, +4, -2
E)+1, +6, -6

Question 60

Identify the reducing agent in the following chemical reaction.
5Fe²⁺(aq)+ MnO₄^-(aq) + 8H⁺(aq) $\rarr$ 5Fe³⁺(aq)+ Mn²⁺(aq)+ 4H₂O(l)

A)Fe²⁺
B)MnO₄^-
C)H⁺
D)Mn²⁺
E)Fe³⁺

Question 61

When 20.0 mL of a 0.250 M (NH₄)₂S solution is added to 150.0 mL of a solution of Cu(NO₃)₂, a CuS precipitate forms. The precipitate is then filtered from the solution, dried, and weighed. If the recovered CuS is found to have a mass of 0.3491 g, what was the concentration of copper ions in the original Cu(NO₃)₂ solution?

A)3.65 * 10^-3 M
B)1.22 * 10^-2 M
C)3.33 * 10^-2 M
D)4.87 * 10^-2 M
E)2.43 * 10^-2 M

Question 62

A 350. mL sample of 0.276M HNO₃ is partially neutralized by 125 mL of 0.0120M Ca(OH)₂. Find the concentration of nitric acid in the resulting solution.

A)0.210 M
B)0.00632 M
C)0.203 M
D)0.0240 M
E)0.197 M

Question 63

What mass of Na₂SO₄ is needed to prepare 350. mL of a solution having a sodium ion concentration of 0.125 M?

A)3.11 g
B)24.9 g
C)12.4 g
D)6.21 g
E)8.88 g

Question 64

A 3.682 g sample of KClO₃ is dissolved in enough water to give 375. mL of solution. What is the chlorate ion concentration in this solution?

A)3.00 * 10^-2 M
B)4.41 * 10^-2 M
C)0.118 M
D)1.65 * 10^-2 M
E)8.01 * 10^-2 M

Question 65

Which of the following represents an acid-base neutralization reaction?

A)2Al(s)+ 3H₂SO₄(aq) $\rarr$ Al₂(SO₄)₃(aq)+ 3H₂(g)
B)SO₂(g)+ H₂O(l) $\rarr$ H₂SO₃(g)
C)LiOH(aq)+ HNO₃(aq) $\rarr$ LiNO₃(aq)+ H₂O(l)
D)2KBr(aq)+ Cl₂(g) $\rarr$ 2KCl(aq)+ Br₂(l)
E)CaBr₂(aq)+ H₂SO₄(aq) $\rarr$ CaSO₄(s)+ 2HBr(g)

Question 66

Which of the following represents a precipitation reaction?

A)2H₂(g)+ O₂(g) $\rarr$ 2H₂O(l)
B)CaBr₂(aq)+ H₂SO₄(aq) $\rarr$ CaSO₄(s)+ 2HBr(g)
C)2KNO₃(s) $\rarr$ 2KNO₂(s)+ O₂(g)
D)2KBr(aq)+ Cl₂(g) $\rarr$ 2KCl(aq)+ Br₂(l)
E)2Al(s)+ 3H₂SO₄(aq) $\rarr$ Al₂(SO₄)₃(aq)+ 3H₂(g)

Question 67

Which of the following represents a hydrogen displacement reaction?

A)2C₂H₆(g)+ 7O₂(g) $\rarr$ 4CO₂(g)+ 6H₂O(l)
B)2KBr(aq)+ Cl₂(g) $\rarr$ 2KCl(aq)+ Br₂(l)
C)N₂(g)+ 3H₂(g) $\rarr$ 2NH₃(g)
D)CaBr₂(aq)+ H₂SO₄(aq) $\rarr$ CaSO₄(s)+ 2HBr(g)
E)2Al(s)+ 3H₂SO₄(aq) $\rarr$ Al₂(SO₄)₃(aq)+ 3H₂(g)

Question 68

When 50.0 mL of a 0.3000 M AgNO₃ solution is added to 50.0 mL of a solution of MgCl₂, an AgCl precipitate forms immediately. The precipitate is then filtered from the solution, dried, and weighed. If the recovered AgCl is found to have a mass of 0.1183 g, what is the concentration of magnesium ions in the original MgCl₂ solution?

A)0.300 M
B)8.25 * 10^-3 M
C)1.65 * 10^-2 M
D)2.06 * 10^-5 M
E)4.13 * 10^-3 M

Question 69

Which of the following represents a combustion reaction?

A)2C₂H₆(g)+ 7O₂(g) $\rarr$ 4CO₂(g)+ 6H₂O(l)
B)LiOH(aq)+ HNO₃(aq) $\rarr$ LiNO₃(aq)+ H₂O(l)
C)N₂(g)+ 3H₂(g) $\rarr$ 2NH₃(g)
D)2Na(s)+ 2H₂O(l) $\rarr$ 2NaOH(aq)+ H₂(g)
E)2Al(s)+ 3H₂SO₄(aq) $\rarr$ Al₂(SO₄)₃(aq)+ 3H₂(g)

Question 70

What mass of K₂CO₃ is needed to prepare 200. mL of a solution having a potassium ion concentration of 0.150 M?

A)4.15 g
B)10.4 g
C)13.8 g
D)2.07 g
E)1.49 g

Question 71

A 250. mL sample of 0.0328M HCl is partially neutralized by the addition of 100. mL of 0.0245M NaOH. Find the concentration of hydrochloric acid in the resulting solution.

A)0.00700 M
B)0.0164 M
C)0.0383 M
D)0.0230 M
E)0.0575 M

Question 72

A 20.00 mL sample of 0.1015 M nitric acid is introduced into a flask, and water is added until the volume of the solution reaches 250. mL. What is the concentration of nitric acid in the final solution?

A)1.27 M
B)8.12 * 10^-3 M
C)0.406 M
D)3.25 * 10^-2 M
E)5.08 * 10^-4 M

Question 73

When solid iron(II)hydroxide is added to water, the resulting solution contains 1.4 * 10^-3g of dissolved iron(II)hydroxide per liter of solution. What is the hydroxide ion concentration in this solution?

A)7.8 * 10^-6 M
B)1.6 * 10^-5 M
C)2.5 * 10^-10 M
D)3.1 *10^-5 M
E)4.0 * 10^-3 M

Question 74

A 4.691 g sample of MgCl₂ is dissolved in enough water to give 750. mL of solution. What is the magnesium ion concentration in this solution?

A)3.70 * 10^-2 M
B)1.05 * 10^-2 M
C)6.57 * 10^-2 M
D)4.93 * 10^-2 M
E)0.131 M

Question 75

A 50.0 mL sample of 0.436 M NH₄NO₃ is diluted with water to a total volume of 250.0 mL. What is the ammonium nitrate concentration in the resulting solution?

A)21.8 M
B)0.459 M
C)2.18 * 10^-2 M
D)8.72 * 10^-2 M
E)0.109 M

Question 76

Which of the following represents a halogen displacement reaction?

A)2KBr(aq)+ Cl₂(g) $\rarr$ 2KCl(aq)+ Br₂(l)
B)2Na(s)+ 2H₂O(l) $\rarr$ 2NaOH(aq)+ H₂(g)
C)CaBr₂(aq)+ H₂SO₄(aq) $\rarr$ CaSO₄(s)+ 2HBr(g)
D)2KNO₃(s) $\rarr$ 2KNO₂(s)+ O₂(g)
E)2LiOH(aq)+ H₂SO₄(aq) $\rarr$ Li₂SO₄(aq)+ 2H₂O(l)

Question 77

Which of the following represents a metal displacement reaction?

A)2NaN₃(s) $\rarr$ 2Na(s)+ 3N₂(g)
B)Fe₂O₃(s)+ 2Al(s) $\rarr$ 2Fe(s)+ Al₂O₃(s)
C)3NO₂(g)+ H₂O(l) $\rarr$ 2HNO₃(aq)+ NO(g)
D)2P(s)+ 3Cl₂(g) $\rarr$ 2PCl₃(g)
E)2ZnS(s)+ 3O₂(g) $\rarr$ 2ZnO(s)+ 2SO₂(g)

Question 78

What mass of Li₃PO₄ is needed to prepare 500. mL of a solution having a lithium ion concentration of 0.175 M?

A)6.75 g
B)10.1 g
C)19.3 g
D)30.4 g
E)3.38 g

Question 79

When 38.0 mL of 0.1250 M H₂SO₄ is added to 100. mL of a solution of PbI₂, a precipitate of PbSO₄ forms. The PbSO₄ is then filtered from the solution, dried, and weighed. If the recovered PbSO₄ is found to have a mass of 0.0471 g, what was the concentration of iodide ions in the original solution?

A)3.10 * 10^-4 M
B)1.55* 10^-4 M
C)6.20 * 10^-3 M
D)3.11 * 10^-3 M
E)1.55 * 10^-3 M

Question 80

A 0.9182 g sample of CaBr₂ is dissolved in enough water to give 500. mL of solution. What is the calcium ion concentration in this solution?

A)9.19 * 10^-3 M
B)2.30 * 10^-3 M
C)2.72 * 10^-3 M
D)4.59 * 10^-3 M
E)1.25 * 10^-3 M