Deck 4: Chemical Reactions

Question 1

Which one of the following equations is properly balanced?

A) Sn + 4HNO₃ $\to$ SnO₂ + 4NO₂ + 2H₂O
B) 2Na₂SO₄ + 3Bi(NO₃)₃ $\to$ Bi₂(SO₄)₃ + 9NaNO₃
C) CH₃CHO + 3O₂ $\to$ 2CO₂ + 2H₂O
D) NH₄NO₃ $\to$ 2H₂O + N₂
E) Na₂CO₃ + 2H₂SO₄ $\to$ Na₂SO₄ + 2H₂O + CO₂

Answer 1

Sn + 4HNO₃ $\to$ SnO₂ + 4NO₂ + 2H₂O

Question 2

Which of the following equations is $\underline{\text{ not }}$ balanced?

A) 2Sb₂OS₂ + 10O₂ $\to$ 2Sb₂O₅ + 4SO₃
B) (NH₄)₂Cr₂O₇ $\to$ N₂ + 4H₂O + Cr₂O₃
C) C₁₂H₂₂O₁₁ + 12O₂ $\to$ 12CO₂ + 11H₂O
D) 2NaCl + Pb(NO₃)₂ $\to$ PbCl₂ + 2NaNO₃
E) Fe₃O₄ + 3CO $\to$ 3Fe + 3CO₂

Answer 2

Fe₃O₄ + 3CO $\to$ 3Fe + 3CO₂

Question 3

The reaction of elemental chlorine with potassium iodide yields elemental iodine and potassium chloride.Write a balanced chemical equation for this reaction.

A) Cl₂(g)+ KI(s) $\to$ I(s)+ KCl₂(s)
B) Cl₂(g)+ 2 KI(s) $\to$ I₂(s)+ 2 KCl(s)
C) Cl₂(g)+ KI₂(s) $\to$ I₂(s)+ KCl₂(s)
D) Cl(g)+ KI(s) $\to$ I(s)+ KCl(s)
E) Cl₂(g)+ 2 K₂I(s) $\to$ I₂(s)+ 2 K₂Cl(s)

Answer 3

Cl₂(g)+ 2 KI(s) $\to$ I₂(s)+ 2 KCl(s)

Question 4

What is the smallest whole number coefficient for sodium hydroxide when the following equation is balanced?
__Na₂SO₄ + __Al(OH)₃ $\to$ __Al₂(SO₄)₃ + __NaOH

A) 1
B) 2
C) 3
D) 4
E) 6

Question 5

Which of the following statements is/are CORRECT?
1)Most ionic compounds containing phosphate ion are insoluble in water.
2)Most ionic compounds containing potassium ion are insoluble in water.
3)Most ionic compounds containing hydroxide ion are soluble in water.

A) 1 only
B) 2 only
C) 3 only
D) 1 and 2
E) 1,2,and 3

Question 6

The complete combustion of nonane,C₉H₂₀,yields carbon dioxide and water: The $\underline{\text{ smallest whole-number }}$ coefficient of $\underline{\text{ oxygen }}$ in the balanced equation is

A) 15.
B) 12.
C) 16.
D) 13.
E) 14.

Question 7

A precipitate is expected when an aqueous solution of potassium iodide is added to an aqueous solution of

A) calcium nitrate.
B) barium hydroxide.
C) lead perchlorate.
D) iron(II)chloride.
E) sodium sulfate.

Question 8

Which of the following compounds is $\underline{\text{soluble }}$ in water?

A) Sc₂O₃
B) Cs₃N
C) FeS
D) Hg₂Br₂
E) CdS

Question 9

Nitroglycerin decomposes violently according to the balanced chemical equation below.2 C₃H₅(NO₃)₃( ) $\to$ 3 N₂(g)+ 1/2 O₂(g)+ 6 CO₂(g)+ 5 H₂O(g)
Which of the following statements concerning this reaction is/are CORRECT?
1)Two moles of nitroglycerine will produce three moles of nitrogen and five moles of water.
2)Four molecules of nitroglycerine will produced one molecule of oxygen and twelve molecules of carbon dioxide.
3)Six grams of nitroglycerine will produce nine grams of nitrogen and fifteen grams of water.

A) 1 only
B) 2 only
C) 3 only
D) 1 and 2
E) 1,2,and 3

Question 10

Which one of the statements below is $\textbf{ false }$ concerning the following reaction:
NH₃(g)+ H₂O $\to$ NH₄⁺(aq)+ OH^-(aq)

A) The double arrows indicate that ammonia,NH₃,is only very slightly soluble in water.
B) The reaction is reversible.
C) When NH₃ is added to H₂O,NH₄⁺ and OH^- ions are produced in a 1:1 ratio.
D) When solutions of NH₄⁺ and OH^- are mixed,some ammonia is produced.
E) Ammonia partially reacts with water.

Question 11

Metals react with oxygen gas to produce oxides with the general formula M_xO_y.Write a balanced chemical equation for the reaction of titanium with oxygen to yield titanium(IV)oxide.

A) 4 Ti(s)+ O₂(g) $\to$ 2 Ti₂O(s)
B) Ti(s)+ O₂(g) $\to$ TiO₂(s)
C) 2 Ti(s)+ O₂(g) $\to$ 2 TiO(s)
D) Ti(s)+ O(g) $\to$ TiO(s)
E) 8 Ti(s)+ O₂(g) $\to$ 2 Ti₄O(s)

Question 12

Which of the following statements is/are CORRECT?
1)Water soluble ionic compounds,such as NaCl,are strong electrolytes.
2)Some molecular compounds,such as HCl,are strong electrolytes.
3)Some molecular compounds,such as acetic acid,are weak electrolytes.

A) 1 only
B) 2 only
C) 3 only
D) 1 and 2
E) 1,2,and 3

Question 13

Which of the following statements concerning electrolytes and nonelectrolytes is/are true?
1)Some molecular substances are electrolytes.
2)All electrolytes are ionic substances.
3)Strong electrolytes partially ionize in solution.

A) 1 only
B) 2 only
C) 3 only
D) 1 and 3
E) 2 and 3

Question 14

What is the balanced chemical equation for the complete combustion of benzoic acid,C₆H₅CO₂H,to form carbon dioxide and water?

A) C₆H₅CO₂H(s) $\to$ 6 C(s)+ CO₂(g)+ 3 H₂(g)
B) C₆H₅CO₂H(s) $\to$ 7 CO₂(g)+ 3 H₂O(g)
C) C₆H₅CO₂H(s)+ O₂(g) $\to$ CO₂(g)+ H₂O(g)
D) C₆H₅CO₂H(s)+ 8 O₂(g) $\to$ 7 CO₂(g)+ 3 H₂O(g)
E) 2 C₆H₅CO₂H(s)+ 15 O₂(g) $\to$ 14 CO₂(g)+ 6 H₂O(g)

Question 15

Which of the following statements is/are CORRECT?
1)A solution is a homogeneous mixture of two or more substances.
2)A solute is a mixture of a solvent and a soluble compound.
3)Aqueous solutions are solutions in which water is a solvent.

A) 1 only
B) 2 only
C) 3 only
D) 1 and 2
E) 1 and 3

Question 16

What are the smallest whole number coefficients the reactants and products when the following molecular equation is correctly balanced?
__NH₃(g)+__O₂(g) $\to$ __NO(g)+ __H₂O(g)

A) 1,1,1,1
B) 2,3,2,3
C) 3,2,3,4
D) 3,4,3,4
E) 4,5,4,6

Question 17

Which one of the following compounds is a nonelectrolyte when dissolved in water?

A) HCl
B) CaCl₂
C) CCl₄
D) Cu(NO₃)₂
E) NaCH₃CO₂

Question 18

The products of the complete combustion of octane,C₈H₁₈,are carbon dioxide and water.Write a balanced chemical equation for this reaction.

A) C₈H₁₈( ) $\to$ 8 C(s)+ 9 H₂(g)
B) C₈H₁₈( )+ 25 O₂(g) $\to$ 8 CO₂(g)+ 9 H₂O(g)
C) 2 C₈H₁₈( )+ 25 O₂(g) $\to$ 16 CO₂(g)+ 18 H₂O(g)
D) C₈H₁₈( )+ 16 O₂(g) $\to$ 8 CO₂(g)+ 9 H₂(g)
E) 2 C₈H₁₈( )+ 17 O₂(g) $\to$ 16 CO(g)+ 18 H₂O(g)

Question 19

The balanced chemical equation for the combustion of methane is:
CH₄(g)+ 2 O₂(g) $\to$ CO₂(g)+ 2 H₂O(g)
Which of the following statements concerning this chemical equation is/are correct?
1)One gram of methane gas reacts with two grams of dioxygen gas,producing one gram of carbon dioxide gas and two grams of gaseous water.
2)One mole of methane gas reacts with two moles of dioxygen gas,producing one mole of carbon dioxide gas and two moles of gaseous water.
3)One molecule of methane gas reacts with two molecules of dioxygen gas,producing one molecule of carbon dioxide gas and two molecules of gaseous water.

A) 1 only
B) 2 only
C) 2 and 3
D) 1 and 3
E) 1,2 and 3

Question 20

Which of the following statements is/are CORRECT?
1)Most ionic compounds containing nitrate ion are soluble in water.
2)Most ionic compounds containing sulfate ion are insoluble in water.
3)Most ionic compounds containing carbonate ion are soluble in water.

A) 1 only
B) 2 only
C) 3 only
D) 1 and 2
E) 1,2,and 3

Question 21

When aqueous solutions of calcium iodide,CaI₂,and silver nitrate,AgNO₃,are combined,which of the following statements below describes what occurs:

A) A precipitate of Ca(NO₃)₂ forms
B) A precipitate of AgI forms
C) Both Ca(NO₃)₂ and AgI precipitate
D) No precipitate will form

Question 22

What products result from mixing aqueous solutions of Ni(NO₃)₂(aq)and NaOH(aq)?

A) Ni(OH)₂(s),Na⁺(aq),and NO₃^-(aq)
B) Ni(OH)₂(s)and NaNO₃(s)
C) Ni₂(OH)₂(aq)and NaNO₃(aq)
D) Ni(OH)₂(aq)and NaNO₃(s)
E) Ni(OH)₂(s),N₂(g),and H₂O(l)

Question 23

Which of the following compounds is $\underline{\text{ insoluble }}$ in water?

A) NH₄Br
B) KBr
C) ZnCl₂
D) AgBr
E) NaBr

Question 24

Write a balanced chemical equation for the reaction of aqueous solutions of magnesium chloride and potassium phosphate.

A) MgCl₂(aq)+ K₃PO₄(aq) $\to$ K₃Mg(s)+ PO₄Cl₂(aq)
B) 3 MgCl₂(aq)+ 2 K₃PO₄(aq) $\to$ 3 K₂Mg(s)+ 2 PO₄Cl₃(aq)
C) MgCl(aq)+ KPO₄(aq) $\to$ MgPO₄(s)+ KCl(aq)
D) MgCl₂(aq)+ 2 KPO₄(aq) $\to$ Mg(PO₄)₂(s)+ 2 KCl(aq)
E) 3 MgCl₂(aq)+ 2 K₃PO₄(aq) $\to$ Mg₃(PO₄)₂(s)+ 6 KCl(aq)

Question 25

All of the following compounds are $\underline{\text{ soluble }}$ in water except ____.

A) RuCO₃
B) K₂CO₃
C) (NH₄)₂CO₃
D) Cs₂CO₃
E) Li₂CO₃

Question 26

Which of the following would $\underline{\text{ not }}$ be depicted as the individual ions on the reactant side of a complete ionic reaction?

A) NaOH
B) HCl
C) Cd(NO₃)₂
D) CdCO₃
E) CrCl₃

Question 27

If an aqueous solution of ____ is added to a mixture of Pb²⁺ and Ba²⁺,the lead ion will precipitate,but the barium ion will remain in solution.

A) NaOH
B) Na₂SO₄
C) K₃PO₄
D) KCO₃
E) Ca(CH₃CO₂)₂

Question 28

Which anion will form a precipitate with Li⁺?

A) Cl^-
B) SO₄^2-
C) C₂H₃O₂^-
D) S^2-
E) none

Question 29

Which of the following reactions best describes the dissolution of solid LiOH(s)in water?

A) LiOH(s)+ H₂O(l) $\to$ LiO^-(aq)+ H₃O⁺(aq)
B) LiOH(s) $\to$ LiO^-(aq)+ H⁺(aq)
C) LiOH(s) $\to$ Li⁺(aq)+ OH^-(aq)
D) LiOH(s) $\to$ LiO⁺(aq)+ H^-(aq)
E) LiOH(s) $\to$ LiOH(aq)

Question 30

Which of the following compounds is $\underline{\text{soluble }}$ in water?

A) Al₂S₃
B) K₂O
C) CoS
D) Hg₂I₂
E) HgO

Question 31

What is the net ionic equation for the reaction of aqueous sodium hydroxide and aqueous iron(II)chloride?

A) Na⁺(aq)+ OH^-(aq) $\to$ NaOH(s)
B) Na⁺(aq)+ Cl^-(aq) $\to$ NaCl(s)
C) Fe²⁺(aq)+ 2 OH^-(aq) $\to$ Fe(OH)₂(s)
D) Fe²⁺(aq)+ OH^-(aq) $\to$ FeOH⁺(s)
E) Fe²⁺(aq)+ 2 Cl^-(aq) $\to$ FeCl₂(s)

Question 32

Which of the following combinations will produce a precipitate?
1)AgNO₃(aq)and HCl(aq)
2)FeCl₃(aq)and Na₂CO₃(aq)
3)NaOH(aq)and K₃PO₄(aq)

A) 1 only
B) 2 only
C) 3 only
D) 1 and 2
E) 1,2,and 3

Question 33

All of the following compounds are $\underline{\text{insoluble }}$ in water except ____.

A) BaCO₃
B) PbF₂
C) Fe(OH)₃
D) Ni(ClO₄)₂
E) PbCrO₄

Question 34

Which equation best represents the balanced $\underline{\text{ net ioni}}$ c equation for the reaction that occurs when aqueous solutions of sodium phosphate and iron(II)nitrate are mixed?

A) 3Fe²⁺(aq)+ 2PO₄^3-(aq) $\to$ Fe₃(PO₄)₂(s)
B) 2Na⁺(aq)+ Fe(NO₃)₂(aq) $\to$ 2NaNO₃(aq)+ Fe²⁺(aq)
C) 3Fe²⁺(aq)+ 2PO₄^3-(aq) $\to$ Fe₃(PO₄)₂(aq)
D) 2Na₃PO₄(aq)+ 3Fe²⁺(aq) $\to$ Fe₃(PO₄)₂(s)+ (Na⁺)₆(aq)
E) 2Na₃PO₄(aq)+ 3Fe(NO₃)₂(aq) $\to$ Fe₃(PO₄)₂(s)+ 6NaNO₃(aq)

Question 35

Which anion will form a precipitate with Ca²⁺?

A) Cl^-
B) OH^-
C) C₂H₃O₂^-
D) Br^-
E) none

Question 36

Which of the following ions is most likely to form an $\underline{\text{ insoluble }}$ compound when combined with sulfate ion?

A) Pb²⁺
B) F^-
C) K⁺
D) Li⁺
E) S^2-

Question 37

A precipitate will form when aqueous Pb(NO₃)₂ is added to an aqueous solution of ____.

A) Cu(NO₃)₂
B) NaI
C) NaCH₃CO₂
D) Pb(ClO₄)₂
E) KNO₃

Question 38

Write a balanced chemical equation for the reaction of aqueous solutions of sodium sulfide and zinc(II)chloride.

A) Na₂S(aq)+ ZnCl₂(aq) $\to$ ZnS(s)+ 2 NaCl(aq)
B) Na₂S(aq)+ ZnCl₂(aq) $\to$ ZnS(s)+ 2 NaCl(s)
C) Na₂S(aq)+ ZnCl₂(aq) $\to$ Na₂Zn(s)+ SCl₂(aq)
D) Na₂S(aq)+ ZnCl₂(aq) $\to$ Na₂Zn(aq)+ SCl₂(g)
E) No reaction occurs.

Question 39

If an aqueous solution of ____ is added to a mixture of F^- and SO₄^2-,the fluoride ion will precipitate,but the sulfate ion will remain in solution.

A) LiBr
B) HNO₃
C) Pb(ClO₄)₂
D) MgNO₃
E) AlCl₃

Question 40

A precipitate will form when aqueous nickel(II)chloride is added to an aqueous solution of ____.

A) SrI₂
B) Cu(NO₃)₂
C) KOH
D) Na₂SO₄
E) NaBr

Question 41

Which of the following is a $\underline{\text{ strong base }}$ in aqueous solution?

A) HOCH₂CH₂OH
B) Sr(OH)₂
C) H₃PO₄
D) NH₃
E) HI

Question 42

Hydrocyanic acid,HCN,is a weak acid.Write a net ionic equation for the reaction of aqueous hydrocyanic acid and aqueous sodium hydroxide.

A) HCN(aq)+ NaOH(aq) $\to$ Na⁺(aq)+ CN^-(aq)+ H₂O( )
B) HCN(aq)+ H₂O(aq) $\to$ CN^-(aq)+ H₃O⁺(aq)
C) H⁺(aq)+ OH^-(aq) $\to$ H₂O( )
D) HCN(aq)+ OH^-(aq) $\to$ CN^-(aq)+ H₂O( )
E) H⁺(aq)+ NaOH(aq) $\to$ Na⁺(aq)+ H₂O( )

Question 43

What is the balanced equation for carbonate ion (CO₃^2-)acting as a Brønsted base in a reaction with water?

A) CO₃^2-(aq)+ 3 H₂O( ) CO₄^4-(aq)+ 2 H₃O⁺(aq)
B) CO₃^2-(aq)+ H₂O( ) HCO₃^-(aq)+ OH^-(aq)
C) CO₃^2-(aq)+ H₂O( ) CO₂(g)+ 2 OH^-(aq)
D) CO₃^2-(aq)+ 2 H₂O( ) HCO₃^-(aq)+ H₃O⁺(aq)
E) CO₃^2-(aq)+ H₂O( ) H₂CO₄^2-(aq)

Question 44

Which of the following is a weak electrolyte in aqueous solution?

A) Mg(OH)₂
B) NH₃
C) NaOH
D) KOH
E) Ba(OH)₂

Question 45

What are the spectator ions in the reaction between aqueous hydrochloric acid and aqueous potassium hydroxide?

A) K⁺ only
B) H⁺ and OH^-
C) K⁺ and Cl^-
D) Cl^- only
E) H⁺,Cl^-,K⁺,and OH^-

Question 46

Which of the following compounds will produce a basic solution when dissolved in water?

A) CaO
B) NaHSO₄
C) CO₂
D) SO₂
E) KCl

Question 47

Which of the following is a $\underline{\text{ weak base }}$ in aqueous solution?

A) LiCl
B) LiOH
C) NH₃
D) HBr
E) Ca(OH)₂

Question 48

Which of the following compounds is a $\underline{\text{weak acid }}$ in aqueous solution?

A) HCl
B) H₃PO₄
C) HNO₃
D) HClO₄
E) H₂SO₄

Question 49

Which of the following would $\underline{\text{ not }}$ be depicted as the individual ions on the reactant side of a complete ionic reaction?

A) RbOH
B) HBr
C) ZnBr₂
D) CH₃COOH
E) MnCl₃

Question 50

What is the net ionic equation for the neutralization of hydroiodic acid with aqueous potassium hydroxide?

A) H⁺(aq)+ OH^-(aq) $\to$ H₂O( )
B) H⁺(aq)+ I^-(aq)+ K⁺(aq)+ OH^-(aq) $\to$ KI(aq)+ H₂O( )
C) H⁺(aq)+ I^-(aq)+ K⁺(aq)+ OH^-(aq) $\to$ HI(aq)+ KOH(aq)
D) HI(aq)+ K⁺(aq)+ OH^-(aq) $\to$ KI(aq)+ H₂O( )
E) HI(aq)+ KOH(aq) $\to$ KI(aq)+ H₂O( )

Question 51

Which of the following is a $\underline{\text{ strong acid }}$ in aqueous solution?

A) HOCH₂CH₂OH
B) Mg(OH)₂
C) H₃PO₄
D) NH₃
E) HNO₃

Question 52

When solutions of barium chloride and lithium sulfate are mixed,the $\underline{\text{ spectator ions }}$ in the resulting precipitation reaction are

A) only SO₄^2-.
B) both Li⁺ and Cl^-.
C) only Cl^-.
D) only Li⁺.
E) only Ba²⁺.

Question 53

Which equation best represents the $\underline{\text{ net ionic reaction }}$ that occurs when an aqueous solution of barium bromide is mixed with an aqueous solution of sodium sulfate?

A) 2H⁺(aq)+ 2Br^-(aq) $\to$ 2HBr(g)
B) Ba²⁺(aq)+ SO₄^2-(aq) $\to$ BaSO₄(s)
C) Ba²⁺(aq)+ 2Br^-(aq)+ 2Na⁺(aq)+ SO₄^2-(aq) $\to$ BaSO₄(s)+ 2NaBr(aq)
D) BaBr₂(aq)+ Na₂SO₄(aq) $\to$ BaSO₄(s)+ 2NaBr(aq)
E) No net reaction occurs.

Question 54

Write a balanced equation for the reaction that occurs when hydrogen sulfate ion behaves as a Brønsted-Lowry acid in water.

A) HSO₄^-(aq)+ H₂O( ) H₂SO₄(aq)+ H₃O⁺(aq)
B) SO₄^2-(aq)+ H₂O( ) HSO₄^-(aq)+ OH^-(aq)
C) HSO₄^-(aq)+ H₂O( ) SO₄^2-(aq)+ H₃O⁺(aq)
D) HSO₄^-(aq)+ H₂O( ) H₂SO₄(aq)+ OH^-(aq)
E) H₂SO₄(aq)+ H₂O( ) HSO₄^-(aq)+ H₃O⁺(aq)

Question 55

What are the spectator ions in the reaction between aqueous nitric acid and ammonia?

A) H⁺ only
B) NO₃^- only
C) H⁺ and NH₄⁺
D) NO₃^- and NH₄⁺
E) H⁺,NO₃^-,and NH₄⁺

Question 56

Metal oxides react with water to produce ____.

A) bases
B) hydrogen gas
C) oxygen gas
D) acids
E) hydronium ions

Question 57

What base results when Li₂O reacts with water?

A) H₃O⁺(aq)
B) LiH(aq)
C) O^2-(aq)
D) LiOH(aq)
E) LiO^-(aq)

Question 58

In the reaction of acetic acid with aqueous cesium hydroxide,what is the spectator ion?

A) OH^-(aq)
B) There is no spectator ion.
C) C₂H₃O₂^-(aq)
D) Cs⁺(aq)
E) H⁺(aq)

Question 59

Nitric acid is the product of the reaction of ____ and H₂O.

A) SO₃
B) NO₂
C) N₂
D) NH₃
E) N₃^-

Question 60

The net ionic equation for the reaction between aqueous ammonia and hydrochloric acid is

A) HCl(aq)+ NH₃(aq) $\to$ NH₄Cl(aq).
B) H⁺(aq)+ OH^-(aq) $\to$ H₂O( ).
C) HCl(aq)+ OH^-(aq) $\to$ Cl^-(aq)+ H₂O( ).
D) H⁺(aq)+ NH₃(aq) $\to$ NH₄⁺(aq).
E) H⁺(aq)+ Cl^-(aq)+ NH₃(aq) $\to$ NH₄⁺(aq)+ Cl^-(aq).

Question 61

Which species in the reaction below undergoes reduction?
H₂O(g)+ CO(g) $\to$ H₂(g)+ CO₂(g)

A) H₂O
B) CO
C) H₂
D) CO₂
E) None

Question 62

A(n)________ agent gains electrons in an oxidation-reduction reaction.

Question 63

Which of the following chemical equations show oxidation-reduction reactions?
1)Mg(s)+ I₂(aq) $\to$ MgI₂(s)
2)Pb(ClO₄)₂(aq)+ 2 KI(aq) $\to$ PbI₂(s)+ 2 KClO₄(aq)
3)Fe₂O₃(s)+ 3 CO(g) $\to$ 2 Fe(s)+ 3 CO₂(g)

A) 1 only
B) 2 only
C) 1 and 2
D) 1 and 3
E) 2 and 3

Question 64

Write a balanced chemical equation for the reaction of aqueous solutions of ammonium sulfate and sodium hydroxide.

A) (NH₄)₂SO₄(aq)+ 2 NaOH(aq) $\to$ 2 NH₄OH(aq)+ SO₃(g)+ Na₂O(aq)
B) (NH₃)₂SO₄(aq)+ NaOH(aq) $\to$ 2 NH₃(g)+ NaOHSO₄(aq)
C) (NH₃)₂SO₄(aq)+ 2 NaOH(aq) $\to$ 2 NH₃(g)+ Na₂SO₄(aq)+ 2 OH^-(aq)
D) (NH₄)₂SO₄(aq)+ 2 NaOH(aq) $\to$ 2 NH₄⁺(g)+ Na₂SO₄(aq)+ 2 OH^-(aq)
E) (NH₄)₂SO₄(aq)+ 2 NaOH(aq) $\to$ 2 NH₃(g)+ 2 H₂O( )+ Na₂SO₄(aq)

Question 65

Which species is reduced in the reaction below?
I^-(aq)+ ClO^-(aq) $\to$ IO^-(aq)+ Cl^-(aq)

A) I^-
B) H₂O
C) Cl^-
D) IO^-
E) ClO^-

Question 66

Which of the following are classified as precipitation reactions?
1)AgNO₃(aq)+ HCl(aq) $\to$ AgCl(s)+ HNO₃(aq)
2)2Mg(s)+ O₂(g) $\to$ 2MgO(s)
3)Zn(s)+ 2Ag⁺(aq) $\to$ 2Ag(s)+ Zn²⁺(aq)

A) 1 only
B) 2 only
C) 3 only
D) 2 and 3
E) 1,2,and 3

Question 67

In the following reaction,which species is oxidized?
3Rb₂S(s)+ 8H⁺(aq)+ 2NO₃^-(aq) $\to$ 6Rb⁺(aq)+ 3S(s)+ 2NO(g)+ 4H₂O

A) NO₃^-
B) Rb₂S
C) Rb⁺
D) NO
E) H⁺

Question 68

The $\underline{\text{ net ionic equation }}$ for the reaction of magnesium sulfite with nitric acid is

A) MgSO₃(s)+ 2H⁺(aq) $\to$ Mg²⁺(aq)+ SO₂(g)+ H₂O( ).
B) Mg²⁺(aq)+ CO₃^2-(aq)+ 2H⁺(aq)+ 2NO₃^-(aq) $\to$ Mg(NO₃)₂(aq)+ SO₂(g)+ H₂O( ).
C) MgSO₃(s)+ 2HNO₂(aq) $\to$ Mg²⁺(aq)+ 2NO₂^-(aq)+ SO₂(g)+ H₂O( ).
D) Mg(HSO₃)₂(s)+ 2HNO₃(aq) $\to$ Mg²⁺(aq)+ 2NO₃^-(aq)+ SO₂(g)+ 2H₂O( ).
E) MgSO₃(s)+ 2HNO₃(aq) $\to$ Mg²⁺(aq)+ 2NO₃^-(aq)+ SO₂(g)+ H₂O( ).

Question 69

Which of the following is/are classified as an acid-base reaction?
1.AgNO₃(aq)+ HCl(aq) $\to$ AgCl(s)+ HNO₃(aq)
2.2Mg(s)+ O₂(g) $\to$ 2MgO(s)
3.Zn(s)+ 2Ag⁺(aq) $\to$ 2Ag(s)+ Zn²⁺(aq)

A)1 only
B)2 only
C)3 only
D)1,2,and 3
E)none

Question 70

The net ionic equation for the reaction of barium chloride and sodium sulfate is shown below.Ba²⁺(aq)+ SO₄^2-(aq) $\to$ BaSO₄(s)
Chloride and sodium ions are referred to as ________ ions because they are not involved in the reaction.

Question 71

The oxidation number of nitrogen is highest in which of the following?

A) NH₃
B) N₂
C) HNO₂
D) NaNO₃
E) NO₂^-

Question 72

What is the oxidation number of each atom in sodium hydrogen carbonate,NaHCO₃?

A) Na = +1, $~~$ H = -1, $~~$ C = +6,O = -2
B) Na = +1, $~~$ H = +1, $~~$ C = +4,O = -2
C) Na = +1, $~~$ H = -1, $~~$ C = +2,O = -2
D) Na = -1, $~~$ H = +1, $~~$ C = 0,O = -2
E) Na = 0, $~~$ H = 0, $~~$ C = 0,O = 0

Question 73

________ acid is produced in a larger quantity than any other chemical in the United States.This chemical is used in the production of fertilizers,pigments,alcohol,paper and detergents.

Question 74

Which molecule in the reaction below is the oxidizing agent?
2 C₂H₆(g)+ 7 O₂(g) $\to$ 4 CO₂(g)+ 6 H₂O(g)

A) C₂H₆
B) O₂
C) H₂O
D) CO₂
E) None

Question 75

Write a balanced net ionic equation for the reaction of aqueous solutions of baking soda (NaHCO₃)and acetic acid.

A) HCO₃^-(aq)+ CH₃CO₂H(aq) $\to$ CH₃CO₂^-(aq)+ H₂O( )+ CO₂(g)
B) 2 NaHCO₃(aq)+ CH₃CO₂H(aq) $\to$ 2 Na₂CO₃(aq)+ CH₄(aq)+ 2H₂O( )+ CO₂(g)
C) NaHCO₃(aq)+ H⁺(aq) $\to$ H₂CO₃(s)+ Na⁺(aq)
D) HCO₃^-(aq)+ H⁺(aq) $\to$ H₂O( )+ CO₂(g)
E) HCO₃^-(aq)+ H⁺(aq) $\to$ H₂CO₃(aq)

Question 76

Which of the following chemical equations is an acid-base reaction?

A) Ba(OH)₂(aq)+ K₂SO₄(aq) $\to$ BaSO₄(s)+ 2 KOH(aq)
B) 3 NaOH(aq)+ AlCl₃(aq) $\to$ Al(OH)₃(s)+ 3 NaCl(aq)
C) 2 H⁺(aq)+ Zn(s) $\to$ H₂(g)+ Zn²⁺(aq)
D) 2 HCl(aq)+ Pb(NO₃)₂(aq) $\to$ PbCl₂(s)+ 2 HNO₃(aq)
E) H₃PO₄(aq)+ NH₃(aq) $\to$ NH₄⁺(aq)+ H₂PO₄^-(aq)

Question 77

All of the following are oxidation-reduction reactions EXCEPT

A) CaCO₃(s) $\to$ CaO(s)+ CO₂(g)
B) 2 Na(s)+ Br₂(g) $\to$ 2 NaBr(g)
C) Fe(s)+ 2 HCl(aq) $\to$ FeCl₂(aq)+ H₂(g)
D) 2 C(s)+ O₂(g) $\to$ 2 CO(g)
E) 2 H₂O( ) $\to$ 2 H₂(g)+ O₂(g)

Question 78

What is the oxidation number of each O in NH₄(H₂PO₄)?

A) -3
B) +1
C) -2
D) +5
E) 0

Question 79

What is the oxidation number of each O in BaFeO₄?

A) +6
B) +2
C) -2
D) +3
E) 0

Question 80

Which of the following elements generally acts as an oxidizing agent?

A) Br₂
B) H₂
C) Fe
D) C
E) Li