Deck 4: Reactions in Aqueous Solutions

Question 1

Which of these chemical equations describes a metal displacement reaction?

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

Answer 1

Fe₂O₃(s)+ 2Al(s)→ 2Fe(s)+ Al₂O₃(s)

Question 2

Which of these compounds is a nonelectrolyte?

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

Answer 2

C₆H₁₂O₆ (glucose)

Question 3

Which of these compounds is a weak electrolyte?

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

Answer 3

NH₃

Question 4

Which of these chemical equations does not describe a redox reaction?

A)2KBr(aq)+ Cl₂(g)→ 2KCl(aq)+ Br₂(l)
B)2Na(s)+ 2H₂O(l)→ 2NaOH(aq)+ H₂(g)
C)3NO₂(g)+ H₂O(l)→ 2HNO₃(aq)+ NO(g)
D)2KNO₃(s)→ 2KNO₂(s)+ O₂(g)
E)2LiOH(aq)+ H₂SO₄(aq)→ Li₂SO₄(aq)+ 2H₂O(l)

Question 5

Which of these compounds is a weak electrolyte?

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

Question 6

Which accurately characterizes all nonelectrolyte solutions?

A)Nonelectrolyte solutions contain molecules.
B)Nonelectrolyte solutions conduct electricity.
C)Nonelectrolyte solutions react with other solutions.
D)Nonelectrolyte solutions do not conduct electricity.
E)Nonelectrolyte solutions conduct heat.

Question 7

Which process defines how an ionic compounds break apart into its constituent ions upon dissolution?

A)electrolysis
B)dissociation
C)division
D)ionization
E)decomposition

Question 8

Which of these compounds is a strong electrolyte?

A)H₂O
B)N₂
C)CH₃COOH (acetic acid)
D)C₂H₆O (ethanol)
E)KOH

Question 9

Which substance is present in the smallest proportion in a solution?

A)liquid
B)gas
C)solvent
D)solid
E)solute

Question 10

Which of these compounds is a strong electrolyte?

A)H₂O
B)O₂
C)H₂SO₄
D)C₆H₁₂O₆ (glucose)
E)CH₃COOH (acetic acid)

Question 11

Which of these compounds is a nonelectrolyte?

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

Question 12

The distinguishing characteristic of all nonelectrolyte solutions is that they

A)contain ions.
B)do not conduct electricity.
C)react with other solutions.
D)always contain acids.
E)conducts heat.

Question 13

Which process defines how molecular compounds form ions upon dissolution?

A)ionization
B)composition
C)division
D)dissolution
E)decomposition

Question 14

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 15

Which is defined as the maximum amount of solute that will dissolve in a given quantity of solvent at a specific temperature?

A)precipitation
B)combustion
C)solubility
D)super saturation
E)dilution

Question 16

Which is the correct description of a solution?

A)A solution is a heterogeneous mixture of two or more substances.
B)A solution is a homogeneous mixture of two or more substances.
C)A solution may be a gas,solid,or liquid.
D)A solution is any mixture of two or more substances.
E)The first and second choices are correct

Question 17

Which substance is present in the largest proportion in a solution?

A)salute
B)gas
C)solvent
D)solid
E)solute

Question 18

Which of these chemical equations describes a disproportionation reaction?

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

Question 19

Which one of the following substances is the strongest electrolyte?

A)CO
B)CH₃Cl
C)CH₄
D)C₂H₅OH
E)HCl

Question 20

Which of these chemical equations describes a precipitation reaction?

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

Question 21

Based on the solubility rules,which one of these compounds is insoluble in water?

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

Question 22

Which of the following is soluble in water?

A)AgCl
B)Rb₂CrO₄
C)Hg₂I₂
D)CaSO₄
E)PbBr₂

Question 23

If aqueous solutions of lead(II)nitrate and sodium sulfate,which insoluble precipitate is formed?

A)NaNO₃
B)Na₂NO₃
C)PbSO₄
D)Pb₂SO₄
E)PbS

Question 24

Based on the solubility rules,which one of these compounds is insoluble in water?

A)NaCl
B)MgBr₂
C)FeCl₂
D)AgBr
E)ZnCl₂

Question 25

Based on the solubility rules,which one of these compounds is soluble in water?

A)Hg₂Cl₂
B)Na₂S
C)Ag₂CO₃
D)Ag₂S
E)BaCO₃

Question 26

Based on the solubility rules,which of these processes 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 27

Which chemical equation describes a hydrogen displacement reaction?

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

Question 28

Which chemical equation describes a combustion reaction?

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

Question 29

Which of the following is insoluble in water?

A)Li₂CO₃
B)NaOH
C)PbCl₂
D)Ba(OH)₂
E)(NH₄)₂S

Question 30

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

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

Question 31

If aqueous solutions of Na₂CO₃ and BaCl₂ are mixed,which insoluble precipitate is formed?

A)Ba₂CO₃
B)BaCO₃
C)NaCl
D)NaCl₂
E)BaO

Question 32

Based on the solubility rules,which one of these compounds is soluble in water?

A)AgBr
B)AgCl
C)Ag₂CO₃
D)AgNO₃
E)Ag₂S

Question 33

Based on the solubility rules,which one of these compounds is soluble in water?

A)CaSO₄
B)BaSO₄
C)PbSO₄
D)K₂SO₄
E)Ag₂SO₄

Question 34

Which chemical equation describes an acid-base neutralization reaction?

A)2Al(s)+ 3H₂SO₄ (aq)→ Al₂ (SO₄)₃ (aq)+ 3H₂(g)
B)2SO₂(g)+ 2H₂O(l)+ O₂(g)→ 2H₂SO₄(aq)
C)LiOH(aq)+ HNO₃(aq)→ LiNO₃(aq)+ H₂O(l)
D)2KBr(aq)+ Cl₂(g)→ 2KCl(aq)+ Br₂(l)
E)CaBr₂(aq)+ H₂SO₄(aq)→ CaSO₄(s)+ 2HBr(g)

Question 35

If aqueous solutions of KMnO₄,FeSO₄ and H₂SO₄,are mixed,which ions are spectator ions? 2KMnO₄(aq)+ 10FeSO₄(aq)+ 8H₂SO₄(aq)→ K₂SO₄(aq)+ 2MnSO₄(aq)+ 5Fe₂(SO₄)₃(aq)+ 8H₂O(l)

A)only K⁺
B)only SO₄^2-
C)only K⁺ and SO₄^2-
D)only K⁺,SO₄^2- ,and Fe²⁺
E)only K⁺,SO₄^2-,Fe²⁺,and Mn²⁺

Question 36

If aqueous solutions of Pb(NO₃)₂ and NaCl are mixed,which ions,if any,are spectator ions? Pb(NO₃)₂(aq)+ 2NaCl(aq)→ PbCl₂(s)+ 2NaNO₃(aq)

A)Pb²⁺(aq),Cl^-(aq)
B)Na⁺(aq),NO₃^- (aq)
C)Pb²⁺(aq),NO₃^-(aq)
D)Na⁺(aq),Cl^-(aq)
E)None are spectator ions.

Question 37

If aqueous solutions of Mg(C₂H₃O₂)₂ and LiOH are mixed,which insoluble precipitate is formed?

A)LiC₂H₃O₂
B)Li(C₂H₃O₂)₂
C)MgOH
D)Mg(OH)₂
E)CH₃OH

Question 38

What is the net ionic equation if sodium sulfate is mixed with barium hydroxide?

A)2Na⁺(aq)+ SO₄^2-(aq)→ Na₂SO₄(s)
B)Na⁺(aq)+ OH^-(aq)→ NaOH(s)
C)2Ba⁺(aq)+ SO₄^2- (aq)→ Ba₂SO₄(s)
D)Ba²⁺(aq)+ SO₄^2- (aq)→ BaSO₄(s)
E)Ba²⁺(aq)+ 2OH^-(aq)→ Ba(OH)₂(s)

Question 39

If aqueous solutions of ammonium sulfide and copper(II)nitrate are mixed,which insoluble precipitate is formed?

A)CuS
B)Cu₂S
C)NH₄NO₃
D)NH₄(NO₃)₂
E)CuSO₄

Question 40

Identify the net ionic equation for the following reaction: 2NaCl(aq)+ Hg₂(NO₃)2(aq)→ 2NaNO₃(aq)+ Hg₂Cl₂(s)

A)Na⁺(aq)+ NO₃^- (aq)→ NaNO₃(aq)
B)Hg₂²⁺(aq)+ 2Cl-(aq)→ Hg₂Cl₂(s)
C)2Hg⁺(aq)+ 2Cl-(aq)→ 2HgCl(s)
D)Hg₂(NO₃)₂(aq)→ Hg₂²⁺(aq)+ 2NO₃^-(aq)
E)Hg₂²⁺(aq)→ Hg₂(s)

Question 41

Which is present in all aqueous Brønsted acid solutions?

A)H₂
B)H⁺
C)OH^-
D)H₂SO₄
E)Cl^-

Question 42

Which salt is 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 43

Which salt is produced by the neutralization of sodium hydroxide with sulfuric acid?

A)Na₂SO₄
B)Na₂(SO₄)₃
C)Na(SO₄)₂
D)Na₂SO₃
E)Na₂S

Question 44

Which is a strong acid?

A)Ba(OH)₂
B)H₃PO₄
C)HC₂H₃O₂
D)NaCl
E)HClO₄

Question 45

The substance NH₃ is considered to be

A)a weak acid.
B)a weak base.
C)a strong acid.
D)a strong base.
E)neither acidic nor basic.

Question 46

Which salt is produced by the neutralization of hydrobromic acid with magnesium hydroxide?

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

Question 47

Which one of the following is a strong acid?

A)CH₃COOH
B)H₂SO₃
C)NH₃
D)H₃PO₄
E)HClO₃

Question 48

Which of the following is a strong base?

A)NH₃
B)Ca(OH)₂
C)Al(OH)₃
D)B(OH)₃
E)CH₃OH

Question 49

Which of the following is a weak acid?

A)H₂SO₄
B)HNO₃
C)HF
D)HBr
E)HCl

Question 50

The substance (CH₃CH₂)₂NH is considered to be

A)a weak acid.
B)a weak base.
C)a strong acid.
D)a strong base.
E)neither acidic nor basic.

Question 51

Which of the following is a strong acid?

A)H₃PO₄
B)HNO₃
C)HF
D)CH₃COOH
E)H₂O

Question 52

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

A)Pb(NO₃)₂(aq)+ 2NH₄Cl(aq)→ 2NH₄NO₃(aq)+ PbCl₂(s)
B)Pb²⁺(aq)+ 2Cl^-(aq)→ PbCl₂(s)
C)Pb²⁺(aq)+ 2NO₃^-(aq)+ 2NH₄⁺(aq)+ 2Cl^-(aq)→ 2NH₄⁺(aq)+ 2NO₃^-(aq)+ PbCl₂(s)
D)NH₄⁺(aq)+ NO₃^-(aq)→ NH₄NO₃(s)
E)NH₄⁺(aq)+ NO₃^-(aq)→ 2NO(g)+ 2H₂O(l)

Question 53

Which one of the following is a strong acid?

A)H₂CO₃
B)H₂SO₃
C)H₂SO₄
D)H₃PO₄
E)CH₃COOH

Question 54

Which salt is 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 55

If aqueous solutions of Ba(OH)₂ and HNO₃ are mixed,what products are formed?

A)BaN₂(s)+ H₂O(l)
B)Ba(NO₃)₂(aq)+ H₂O(l)
C)Ba(s)+ H₂(g)+ NO₂(g)
D)Ba₂O(s)+ NO₂(g)+ H₂O(l)
E)Ba₃N₂(s)+ H₂O(l)

Question 56

Which salt is formed in the neutralization reaction of hydrochloric acid with calcium hydroxide?

A)CaO
B)CaCl
C)CaH₂
D)CaCl₂
E)NaCl

Question 57

The substance HClO₄ is considered to be

A)a weak acid.
B)a weak base.
C)a strong acid.
D)a strong base.
E)neither acidic nor basic.

Question 58

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 59

Identify the major ions present in an aqueous HNO₃ solution.

A)HN²⁺,O^2-
B)OH^-,NO₃^-
C)OH^-,NO⁺
D)H⁺,N^3-,O^2-
E)H⁺,NO₃^-

Question 60

Which is a strong base?

A)LiOH
B)CH₃COOH
C)NH₃
D)H₃PO₄
E)HClO₂

Question 61

What is the oxidation number of N in K₃Fe(CN)₆?

A)+3
B)-3
C)+4
D)-5
E)+1

Question 62

What is the oxidation number of N in N₂H₄?

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

Question 63

What is the oxidation number of oxygen in potassium superoxide,KO₂?

A)+1
B)0
C)-½
D)+½
E)-2

Question 64

Complete the following reaction and identify the Brønsted acid. NaOH(aq)+ HCl(aq)→

A)NaH(aq)+ HOCl(aq); NaOH is the acid.
B)NaH(aq)+ HOCl(aq); HCl is the acid.
C)NaCl(aq)+ H₂O(l); NaOH is the acid.
D)NaCl(aq)+ H₂O(l); HCl is the acid.
E)NaCl(aq)+ H₂O(l); NaCl is the acid.

Question 65

What is the oxidation number of iodine in I₂?

A)-1
B)0
C)+1
D)+7
E)-7

Question 66

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

A)H₂S
B)SO₂
C)SCl₂
D)H₂SO₃
E)Na₂SO₄

Question 67

Balance the following oxidation-reduction equation: Al(s)+ Ag⁺(aq)→ Al³⁺(aq)+ Ag(s)

A)Al(s)+ Ag⁺(aq)→ Al³⁺(aq)+ Ag(s)
B)3Al(s)+ Ag⁺(aq)→ 3Al³⁺(aq)+ Ag(s)
C)Al(s)+ 3Ag⁺(aq)→ Al³⁺(aq)+ 3Ag(s)
D)3Al(s)+ Ag⁺(aq)→ Al³⁺(aq)+ 3Ag(s)
E)Al(s)+ 3Ag⁺(aq)→ 3Al³⁺(aq)+ Ag(s)

Question 68

What is the oxidation number of Cr in Cr₂O₇^2-?

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

Question 69

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

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

Question 70

Which is the net ionic equation for the reaction between aqueous solutions of lithium hydroxide and hydrobromic acid? LiOH(aq)+ HBr(aq)→ H₂O(l)+ LiBr(aq)

A)LiOH(aq)→ Li⁺(aq)+ OH^-(aq)
B)HBr(aq)→ H⁺(aq)+ Br^-(aq)
C)H⁺(aq)+ OH^-(aq)→ H₂O(l)
D)Li⁺(aq)+ Br^-(aq)→ LiBr(aq)
E)Li⁺(aq)+ OH^-(aq)+ H⁺(aq)+ Br^-(aq)→ H₂O(l)+ LiBr(aq)

Question 71

What is reduced in the following reaction? Cu(NO₃)₂ + Zn → Zn(NO₃)₂ + Cu

A)Cu(NO₃)₂
B)N
C)O
D)Zn
E)NO₃

Question 72

Which is a weak base?

A)NH₃
B)Ca(OH)₂
C)Ba(OH)₂
D)NaOH
E)CH₃COOH

Question 73

What is the oxidation number of sulfur in sulfuric acid?

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

Question 74

Which of the following equations is not a redox reaction?

A)2H₂(g)+ O₂(g)→ 2H₂O(l)
B)Zn(s)+ H₂SO₄(aq)→ ZnSO₄(aq)+ H₂(g)
C)H₂O(l)+ NH₃(g)→ NH₄ ⁺(aq)+ OH^-(aq)
D)6FeSO₄(aq)+ K₂Cr₂O₇(aq)+ 7H₂SO₄(aq)→ Cr₂(SO₄)₃(aq)+ 3Fe₂(SO₄)₃(aq)+ K₂SO₄(aq)+ 7H₂O(l)
E)Cl₂(g)+ 2KBr(aq)→ Br₂(l)+ 2KCl(aq)

Question 75

What is oxidized in the following reaction? Fe + Ag₂O → FeO + 2Ag

A)Ag
B)Ag₂O
C)Fe
D)FeO
E)2Ag

Question 76

What is the reducing agent in the following reaction? Mg + NiO₂ + 2H₂O → Mg(OH)₂ + Ni(OH)₂

A)Mg
B)NiO₂
C)H₂O
D)Mg(OH)₂
E)Ni(OH)₂

Question 77

Complete the following reaction and identify the Brønsted base: NaOH(aq)+ HCl(aq)→

A)Na(aq)+ HOCl(aq); NaOH is the base.
B)NaCl(aq)+ OH^-(aq); HCl is the base.
C)NaCl(aq)+ OH^-(aq); NaOH is the base.
D)H₂O(l)+ NaCl(aq); HCl is the base.
E)NaCl(aq)+ H₂O(l); NaOH is the base.

Question 78

What is the oxidizing agent in the following reaction? 5Fe²⁺(aq)+ MnO₄^-(aq)+ 8H⁺(aq)→ 5Fe³⁺(aq)+ Mn²⁺(aq)+ 4H₂O(l)

A)Fe²⁺
B)MnO₄^-
C)H⁺
D)Mn²⁺
E)Fe³⁺

Question 79

Which equation describes a redox reaction?

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

Question 80

What is the oxidation number of oxygen in KMnO₄?

A)+1
B)-8
C)+5
D)-2
E)+3