Deck 4: Reactions in Aqueous Solutions

Question 1

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-

Answer 1

2K⁺, SO₄^2-

Question 2

Identify the major ionic species present in an aqueous solution of C₁₂H₂₂O₁₁ (sucrose).

A) 12 C^-, 22 H⁺, 11 O^-
B) 12 C⁺, 22 H⁺, 11 O^2-
C) 12 CH²⁺, 11 O^2-
D) C₁₂⁺, 22 H⁺, 11 O^2-
E) no ions are present

Answer 2

no ions are present

Question 3

Which of the following compounds is a weak electrolyte

A) HNO₃
B) NaNO₃
C) HNO₂
D) NaNO₂
E) NaOH

Answer 3

HNO₂

Question 4

Identify the major ionic species present in an aqueous solution of FeCl₃.

A) Fe⁺, Cl₃^-
B) Fe³⁺, Cl₃^3-
C) Fe³⁺, 3 Cl^-
D) Fe²⁺, 3 Cl^-
E) Fe⁺, 3 Cl^-

Question 5

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 6

Identify the major ionic species present in an aqueous solution of C₆H₁₂O₆ (glucose).

A) 6 C^-, 12 H⁺, 6 O^-
B) 6 C⁺, 12 H⁺, 6 O^2-
C) 6 CH²⁺, 6 O^2-
D) C₆⁺, 12 H⁺, 6 O^2-
E) no ions are present

Question 7

Which of the following compounds is a strong electrolyte

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

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

Which of the following compounds is a weak electrolyte

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

Question 10

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

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

Question 11

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

A) AgBr
B) AgCl
C) Ag₂CO₃
D) AgNO₃
E) Ag₂S

Question 12

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

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

Question 13

Which of the following compounds is a strong electrolyte

A) H₂O
B) CH₃OH
C) CH₃CH₂OH
D) HF
E) NaF

Question 14

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

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

Question 15

Identify the major ionic species present in an aqueous solution of NH₄ClO₄.

A) NH₄⁺, Cl^-, 4O²
B) N^3-, 4H⁺, Cl^-, 4O²
C) 4NH⁺, 4ClO^-
D) NH₄⁺, ClO₄^-
E) NH₄Cl⁺, O₄^-

Question 16

Which of the following compounds is a weak electrolyte

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

Question 17

Which of the following compounds is a nonelectrolyte

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

Question 18

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

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

Question 19

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

Question 20

Which of the following compounds is a nonelectrolyte

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

Question 21

Which of the following compounds is a weak base

A) KOH
B) Sc(OH)₃
C) NH₃
D) NH₄⁺
E) CO₂

Question 22

Which of the following will occur when a solution of Pb(NO₃)₂(aq) is mixed with a solution of KI(aq)

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

Question 23

Identify 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) + $2NH^+_4$ (aq) + 2Cl^-(aq) $\rarr$ $2NH^+_4$ (aq) + 2NO₃^- (aq) + PbCl₂(s)
D)NH₄⁺(aq)+ NO₃^- (aq) $\rarr$ 2NH₄NO₃(s)
E) No reaction occurs when the solutions are mixed.

Question 24

Identify the correct net ionic equation for the reaction that occurs when solutions of AgNO₃ and NH₄Cl are mixed.

A)AgNO₃(aq) + NH₄Cl(aq) $\rarr$ AgCl(s) + NH₄Cl(aq)
B)NH₄⁺(aq) + NO₃^-(aq) $\rarr$ NH₄NO₃(s)
C)AgNO₃(aq) + NH₄Cl(aq) $\rarr$ AgCl(s) + NH₄Cl(s)
D)Ag⁺(aq) + Cl^-(aq) $\rarr$ AgCl(s)
E)AgNO₃(aq) + NH₄⁺(aq) $\rarr$ NH₄AgNO₃(s)

Question 25

Which of the following ions is a weak acid

A) SO₄^2-
B) H₂SO₄
C) HSO₄^-
D) HNO₃
E) NO₃^-

Question 26

Identify the precipitate(s) formed when solutions of NH₄Cl(aq), AgClO₃(aq), and NaCl(aq) are mixed.

A) AgCl
B) AgCl and NH₄ClO₃
C) NH₄Cl and NaClO₃
D) NH₄ClO₃
E) AgNH₄

Question 27

Identify the precipitate(s) formed when solutions of Pb(NO₃)₂(aq), Mg(ClO₄)₂(aq), and (NH₄)₂SO₄(aq) are mixed.

A) PbSO₄
B) MgSO₄
C) NH₄ClO₄
D) NH₄NO₃ and NH₄ClO₄
E) PbSO₄ and MgSO₄

Question 28

Which of the following will occur when solutions of ZnSO₄(aq) and MgCl₂(aq) are mixed

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

Question 29

Identify the correct net ionic equation for the reaction that occurs when solutions of Na₃PO₄ and Ca(NO₃)₂ are mixed.

A)Ca²⁺ + PO₄^2-(aq) $\rarr$ CaPO₄(s)
B)3Ca²⁺(aq) + 2PO₄^3-(aq) $\rarr$ Ca₃(PO₄)₂(s)
C) Na⁺(aq) + NO₃^- $\rarr$ NaNO₃(s)
D) Na⁺(aq) + Ca²⁺(aq) + PO₄^3-(aq) $\rarr$ NaCaPO₄(s)
E)2 Na₃PO₄(aq) + 3Ca(NO₃)₂(aq) $\rarr$ 6NaNO₃(s) + Ca₃(PO₄)₂(s)

Question 30

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 31

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

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

Question 32

Which of the following compounds is a weak acid

A) HF
B) HCl
C) HBr
D) HI
E) HClO₄

Question 33

The common constituent in all acid solutions is

A) H₂
B) H⁺
C) OH^-
D) H₂SO₄
E) Cl^-

Question 34

Which of the following compounds is a strong acid

A) HF
B) HI
C) HClO₂
D) H₂SO₃
E) HNO₂

Question 35

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 36

Which of the following will occur when solutions of CuSO₄(aq) and BaCl₂(aq) are mixed

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

Question 37

Identify the precipitate(s) formed when solutions of Na₂SO₄(aq), Ba(NO₃)₂(aq), and NH₄ClO₄(aq) are mixed.

A) Ba(ClO₄)₂
B) BaSO₄ and (NH₄)₂SO₄
C) NH₄NO₃ and NaClO₄
D) BaSO₄
E) NaClO₄

Question 38

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 39

Identify the precipitate(s) formed when solutions of Ca(ClO₄)₂(aq), K₂CO₃(aq), and NaNO₃(aq) are mixed.

A) CaCO₃
B) Na₂CO₃
C) Ca(NO₃)₂ and NaClO₄
D) CaCO₃ and Na₂CO₃
E) KClO₄ and Ca(NO₃)₂

Question 40

Identify the correct net ionic equation for the reaction that occurs when solutions of Ba(ClO₄)₂ and K₂SO₄ are mixed.

A)Ba²⁺(aq) + SO₄^2-(aq) $\rarr$ BaSO₄(s)
B)2K⁺(aq) + 2ClO₄^-(aq) $\rarr$ K₂(ClO₄)₂(s)
C)K⁺(aq) + ClO₄^-(aq) $\rarr$ KClO₄(s)
D)Ba(ClO₄)₂(aq) + K₂SO₄(aq) $\rarr$ BaSO₄(s) + 2KClO₄(s)
E) Ba²⁺(aq) + K⁺(aq) + SO₄^2-(aq) $\rarr$ KBaSO₄(s)

Question 41

The oxidation number of N in NaNO₃ is

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

Question 42

Determine 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 43

Identify the correct net ionic equation for the reaction that occurs when solutions of HF and KOH are mixed.

A)H⁺(aq) + OH^-(aq) $\rarr$ H₂O(l)
B)HF(aq) + OH^-(aq) $\rarr$ H₂O(l) + F^-(aq)
C)H⁺(aq) + KOH(aq) $\rarr$ H₂O(l) + K⁺(aq)
D)HF(aq) + KOH(aq) $\rarr$ H₂O(l) + KF(s)
E)HF(aq) + KOH(s) $\rarr$ H₂O(l) + KF(aq)

Question 44

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 45

The oxidation number of S in K₂SO₄ is

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

Question 46

For the perchlorate ion ClO₄^- , what are the oxidation states of the Cl and O, respectively

A) - 1, - 2
B) +8, - 2
C) +7, - 2
D) +6, - 2
E) +2, - 1

Question 47

How many total electrons are transferred in the following reaction
B₂H₆(g) + 3O₂(g) $\rarr$ B₂O₃(s) + 3H₂O(l)

A) 2
B) 3
C) 4
D) 6
E) 12

Question 48

The oxidation number of N in N₂H₄ is

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

Question 49

Identify the correct net ionic equation for the reaction that occurs when solutions of HClO₄ and Ba(OH)₂ are mixed.

A)H⁺(aq) + 2OH^-(aq) $\rarr$ H₂O(l)
B)H⁺(aq) + OH^-(aq) $\rarr$ H₂O(l)
C)2HClO₄(aq) + Ba(OH)₂(s) $\rarr$ 2H₂O(l) + Ba(ClO₄)₂(aq)
D) 2HClO₄(aq) + Ba(OH)₂(s) $\rarr$ 2H₂O(l) + Ba(ClO₄)₂(s)
E) 2H⁺(aq) + Ba(OH)₂(s) $\rarr$ 2H₂O(l) + Ba²⁺(aq)

Question 50

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

A) H₂S
B) SO₂
C) SCl₂
D) H₂SO₃
E) Na₂SO₄

Question 51

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

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

Question 52

The oxidation number of Mn in KMnO₄ is

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

Question 53

The oxidation number of Cr in Cr₂O₇^2- is

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

Question 54

Identify the correct net ionic equation for the reaction that occurs when solutions of HNO₃ and KOH are mixed

A)HNO₃(aq) + KOH(aq) $\rarr$ H₂O(l) + KNO₃(aq)
B)K⁺(aq) + NO₃^-(aq) $\rarr$ KNO₃(aq)
C)HNO₃(aq) + KOH(aq) $\rarr$ H₂O(l) + KNO₃(s)
D)H⁺(aq) + OH^-(aq) $\rarr$ H₂O(l)
E)HNO₃(aq) + OH^-(aq) $\rarr$ H₂O(l) + NO₃^-(aq)

Question 55

For the chlorate ion, ClO₃^- , what are the oxidation states of the Cl and O, respectively

A) - 1, - 2
B) +5, - 2
C) +6, - 2
D) +7, - 2
E) +2, - 1

Question 56

The highest possible oxidation number of nitrogen is

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

Question 57

Using the redox reaction below determine which element is oxidized and which is reduced.4NH₃ + 3Ca(ClO)₂ $\rarr$ 2N₂ + 6H₂O + 3CaCl₂

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

Question 58

How many total electrons are transferred in the following reaction
4 P(s) + 5O₂(g) $\rarr$ 2P₂O₅(s)

A) 5
B) 10
C) 15
D) 20
E) 25

Question 59

The highest possible oxidation number of carbon is

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

Question 60

Determine 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 61

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 62

Which of the following is NOT a redox reaction

A)2KBr(aq) + Cl₂(g) $\rarr$ 2KCl(aq) + Br₂(l)
B)2Na(s) + 2H₂O(l) $\rarr$ 2NaOH(aq) + H₂(g)
C) V₂O₅(s) + 5 Ca(l) $\rarr$ 2 V(l) + 5 CaO(s)
D)2KNO₃(s) $\rarr$ 2KNO₂(s) + O₂(g)
E)2LiOH(aq) + H₂SO₄(aq) $\rarr$ Li₂SO₄(aq) + 2H₂O(l)

Question 63

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 64

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 65

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 66

Which of the following is NOT a redox 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) NH₄Cl(aq) + AgNO₃ $\rarr$ NH₄NO₃(aq) + AgCl(s)
E)2ZnS(s) + 3O₂(g) $\rarr$ 2ZnO(s) + 2SO₂(g)

Question 67

How many total electrons are transferred in the following reaction
2Na(s) + Cl₂(g) $\rarr$ 2NaCl(s)

A) 1
B) 2
C) 3
D) 4
E) 5

Question 68

Predict the products of the following single replacement reaction.
Ni(s) + Cu(NO₃)₂(aq) $\rarr$

A) No reaction occurs
B) NiNO₃(aq) + CuNO₃(aq)
C) NiCu(aq) 2 NO₃^-(aq)
D) Ni(NO₃)₂(aq) + Cu(s)
E) Ni(NO₃)₂(aq) + Cu²⁺(aq)

Question 69

Predict the products of the following single replacement reaction.
Zn(s) + CoCl₂(aq) $\rarr$

A) No reaction occurs
B) Co(s) + ZnCl₂(aq)
C) CoCl(aq) + ZnCl(aq)
D) ZnCo(aq) + Cl₂(g)
E) ZnCoCl₂(aq)

Question 70

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 71

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 72

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 73

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 74

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 75

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 76

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 77

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 78

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 79

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 80

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)