Question 1

What is the oxidation number of oxygen in KMnO4?

Accepted Answer

A)  +1
B)  −8
C)  +5
D)  −2
E)  +3F) A) and B)
G) A) and C)

Question 2

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

Accepted Answer

A)  NaNO3
B)  Na2NO3
C)  PbSO4
D)  Pb2SO4
E)  PbSF) C) and E)
G) A) and E)

Question 3

When the following equation is balanced with smallest whole number integers, what is the coefficient for HNO3? 3?   A) 1 B) 2 C) 3 D) 4 E) 5" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  5F) A) and B)
G) All of the above

Question 4

Once the following equation is balanced with the smallest set of whole number coefficients, what is the sum of the coefficients? (Don't forget to include coefficients of one.)  __ SF4 + __ H2O → __ H2SO3 + __ HF

Accepted Answer

A)  4
B)  6
C)  7
D)  9
E)  None of these answers is correct.F) A) and D)
G) B) and D) D

Question 5

What is the coefficient of H2O when the following equation is properly balanced with the smallest set of whole numbers? ___ PCl3(l)  + ___ H2O(l)  → ___ H3PO3(aq)  + ___ HCl(aq)

Accepted Answer

A)  1
B)  2
C)  3
D)  5
E)  None of these answers is correct.F) B) and D)
G) A) and D)

Question 6

Which of the following equations is not a redox reaction?

Accepted Answer

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) F) B) and C)
G) B) and D)

Question 7

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)

Accepted Answer

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.F) B) and E)
G) C) and D)

Question 8

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

Accepted Answer

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) F) C) and D)
G) A) and B)

Question 9

What is the oxidation number of iodine in I2?

Accepted Answer

A)  −1
B)  0
C)  +1
D)  +7
E)  −7F) C) and D)
G) B) and D)

Question 10

Which chemical equation describes an acid-base neutralization reaction?

Accepted Answer

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) F) All of the above
G) A) and D) C

Question 11

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

Accepted Answer

A)  H2S
B)  SO2
C)  SCl2
D)  H2SO3
E)  Na2SO4F) A) and B)
G) A) and C)

Question 12

What is the coefficient of H2SO4 when the following equation is properly balanced with the smallest set of whole numbers? ___ Ca3(PO4) 2 + ___ H2SO4 → ___ CaSO4 + ___ H3PO4

Accepted Answer

A)  3
B)  8
C)  10
D)  11
E)  None of these answers is correct.F) All of the above
G) A) and B)

Question 13

Which equation describes a redox reaction?

Accepted Answer

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)  CO32−(aq)  + HSO4−(aq)  → HCO3−(aq)  + SO42−(aq) F) All of the above
G) B) and E)

Question 14

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)

Accepted Answer

A)  only K+ 
B)  only SO42−
C)  only K+ and SO42−
D)  only K+, SO42−, and Fe2+
E)  only K+, SO42−, Fe2+, and Mn2+F) B) and C)
G) None of the above

Question 15

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

Accepted Answer

A)  MgBr
B)  Mg2Br3
C)  MgBr2
D)  Mg3Br2
E)  Mg2BrF) C) and D)
G) A) and B)

Question 16

What is the oxidation number of N in N2H4?

Accepted Answer

A)  +4
B)  +2
C)  −2
D)  −4
E)  0F) A) and E)
G) A) and B)

Question 17

Which balanced chemical equation could represent the following result of a precipitation reaction? 3PO4(aq)  + 3Cr2(SO4) 3(aq)  → CrPO4(s)  + 6KCl(aq)  B) MgSO4(aq)  + 2AgNO3(aq)  → Ag2SO4(s)  + Mg(NO3) 2(aq)  C) MgCl2(aq)  + 2AgC2H3O2(aq)  → 2AgCl(s)  + Mg(C2H3O2) 2(aq)  D) K2CrO4(aq)  + 2AgNO3(aq)  → Ag2CrO4(s)  + 2KNO3(aq)  E) K2S(aq)  + Pb(NO3) 2(aq)  → PbS(s)  + 2KNO3(aq) " class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  2K3PO4(aq)  + 3Cr2(SO4) 3(aq)  → CrPO4(s)  + 6KCl(aq) 
B)  MgSO4(aq)  + 2AgNO3(aq)  → Ag2SO4(s)  + Mg(NO3) 2(aq) 
C)  MgCl2(aq)  + 2AgC2H3O2(aq)  → 2AgCl(s)  + Mg(C2H3O2) 2(aq) 
D)  K2CrO4(aq)  + 2AgNO3(aq)  → Ag2CrO4(s)  + 2KNO3(aq) 
E)  K2S(aq)  + Pb(NO3) 2(aq)  → PbS(s)  + 2KNO3(aq) F) A) and B)
G) C) and E) C

Question 18

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)

Accepted Answer

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) F) A) and E)
G) B) and D)

Question 19

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

Accepted Answer

A)  Ba2CO3
B)  BaCO3
C)  NaCl
D)  NaCl2
E)  BaOF) A) and B)
G) A) and C)

Question 20

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

Accepted Answer

A)  Ag
B)  Ag2O
C)  Fe
D)  FeO
E)  2AgF) A) and C)
G) A) and E)

Exam 10: Chemical Reactions and Chemical Equations

What is the oxidation number of oxygen in KMnO4?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

When the following equation is balanced with smallest whole number integers, what is the coefficient for HNO3?

Correct AnswerverifiedShow Answer

Once the following equation is balanced with the smallest set of whole number coefficients, what is the sum of the coefficients? (Don't forget to include coefficients of one.) __ SF4 + __ H2O → __ H2SO3 + __ HF

Correct AnswerverifiedD

What is the coefficient of H2O when the following equation is properly balanced with the smallest set of whole numbers? ___ PCl3(l) + ___ H2O(l) → ___ H3PO3(aq) + ___ HCl(aq)

Correct AnswerverifiedShow Answer

Which of the following equations is not a redox reaction?

Correct AnswerverifiedShow Answer

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)

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What is the oxidation number of iodine in I2?

Correct AnswerverifiedShow Answer

Which chemical equation describes an acid-base neutralization reaction?

Correct AnswerverifiedC

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

Correct AnswerverifiedShow Answer

What is the coefficient of H2SO4 when the following equation is properly balanced with the smallest set of whole numbers? ___ Ca3(PO4) 2 + ___ H2SO4 → ___ CaSO4 + ___ H3PO4

Correct AnswerverifiedShow Answer

Which equation describes a redox reaction?

Correct AnswerverifiedShow Answer

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)

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What is the oxidation number of N in N2H4?

Correct AnswerverifiedShow Answer

Which balanced chemical equation could represent the following result of a precipitation reaction?

Correct AnswerverifiedC

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)

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What is the oxidation number of oxygen in KMnO₄?

Correct Answer
verified

Correct Answer
verified

When the following equation is balanced with smallest whole number integers, what is the coefficient for HNO₃?

Correct Answer
verified

Once the following equation is balanced with the smallest set of whole number coefficients, what is the sum of the coefficients? (Don't forget to include coefficients of one.) SF₄ + H₂O → H₂SO₃ + HF

Correct Answer
verified
D

What is the coefficient of H₂O when the following equation is properly balanced with the smallest set of whole numbers? _ PCl₃(l) + _ H₂O(l) → _ H₃PO₃(aq) + _ HCl(aq)

Correct Answer
verified

Correct Answer
verified

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)

Correct Answer
verified

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

Correct Answer
verified

What is the oxidation number of iodine in I₂?

Correct Answer
verified

Correct Answer
verified
C

Correct Answer
verified

What is the coefficient of H₂SO₄ when the following equation is properly balanced with the smallest set of whole numbers? _ Ca₃(PO₄) ₂ + _ H₂SO₄ → _ CaSO₄ + _ H₃PO₄

Correct Answer
verified

Correct Answer
verified

If aqueous solutions of KMnO₄, FeSO₄ and H₂SO_4, are mixed, which ions are spectator ions? 2KMnO₄(aq) + 10FeSO₄(aq) + 8H₂SO₄(aq) → K₂SO₄(aq) + 2MnSO₄(aq) + 5Fe₂(SO₄) ₃(aq) + 8H₂O(l)

Correct Answer
verified

Correct Answer
verified

What is the oxidation number of N in N₂H₄?

Correct Answer
verified

Correct Answer
verified
C

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)

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified