Question 1

Suppose aqueous solutions of silver(I)  nitrate and potassium chloride are mixed.Which represents the likely result?

Accepted Answer

A)   
B)   
C)   
D)   E) B) and D)
F) B) and C)

Question 2

Which of these chemical equations describes a metal displacement reaction?

Accepted Answer

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

Question 3

Balance the following equation: Ca3(PO4) 2(s)  + SiO2(s)  + C(s)  → CaSiO3(s)  + CO(g)  + P4(s)

Accepted Answer

A)  Ca3(PO4) 2(s)  + 3SiO2(s)  + 8C(s)  → 3CaSiO3(s)  + 8CO(g)  + P4(s) 
B)  Ca3(PO4) 2(s)  + 3SiO2(s)  + 14C(s)  → 3CaSiO3(s)  + 14CO(g)  + P4(s) 
C)  Ca3(PO4) 2(s)  + 3SiO2(s)  + 8C(s)  → 3CaSiO3(s)  + 8CO(g)  + 2P4(s) 
D)  2Ca3(PO4) 2(s)  + 6SiO2(s)  + 10C(s)  → 6CaSiO3(s)  + 10CO(g)  + P4(s) 
E)  2Ca3(PO4) 2(s)  + 6SiO2(s)  + 10C(s)  → 6CaSiO3(s)  + 10CO(g)  + 4P4(s) F) A) and C)
G) A) and B)

Question 4

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

Accepted Answer

A)  2Na+(aq)  + SO42−(aq)  → Na2SO4(s) 
B)  Na+(aq)  + OH−(aq)  → NaOH(s) 
C)  2Ba+(aq)  + SO42− (aq)  → Ba2SO4(s) 
D)  Ba2+(aq)  + SO42− (aq)  → BaSO4(s) 
E)  Ba2+(aq)  + 2OH−(aq)  → Ba(OH) 2(s) F) C) and E)
G) A) and D)

Question 5

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.)  ___ Al + ___ H2SO4 → ___ Al2(SO4) 3 + ___ H2

Accepted Answer

A)  3
B)  5
C)  6
D)  9
E)  12F) B) and D)
G) A) and D)

Question 6

Balance the following equation: C8H18O3(l)  + O2(g)  → H2O(g)  + CO2(g)

Accepted Answer

A)  C8H18O3(l)  + 8O2(g)  → 9H2O(g)  + 8CO2(g) 
B)  C8H18O3(l)  + 11O2(g)  → 9H2O(g)  + 8CO2(g) 
C)  2C8H18O3(l)  + 22O2(g)  → 9H2O(g)  + 16CO2(g) 
D)  C8H18O3(l)  + 13O2(g)  → 18H2O(g)  + 8CO2(g) 
E)  2C8H18O3(l)  + 17O2(g)  → 18H2O(g)  + 16CO2(g) F) C) and D)
G) A) and B)

Question 7

What is the oxidation number of sulfur in sulfuric acid?

Accepted Answer

A)  +1
B)  +6
C)  −2
D)  −4
E)  +4F) C) and E)
G) C) and D)

Question 8

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

Accepted Answer

A)  Na2SO4
B)  Na2(SO4) 3
C)  Na(SO4) 2
D)  Na2SO3
E)  Na2SF) C) and E)
G) A) and D)

Question 9

Which element is reduced in the following reaction? Cu + 2H2SO4 → CuSO4 + SO2 + 2H2O

Accepted Answer

A)  Cu
B)  H
C)  S
D)  O
E)  H2OF) A) and B)
G) A) and C)

Question 10

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

Accepted Answer

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

Question 11

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

Accepted Answer

A)  Cu(NO3) 2
B)  N
C)  O
D)  Zn
E)  NO3F) D) and E)
G) B) and E)

Question 12

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

Accepted Answer

A)  CuCl2 will precipitate; Ba2+ and SO42− 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 SO42− are spectator ions.
E)  No precipitate will form.F) B) and D)
G) B) and E)

Question 13

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

Accepted Answer

A)  Fe2+
B)  MnO4−
C)  H+
D)  Mn2+
E)  Fe3+F) B) and E)
G) C) and D)

Question 14

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

Accepted Answer

A)  CaO
B)  CaCl
C)  CaH2
D)  CaCl2
E)  NaClF) A) and E)
G) A) and D)

Question 15

What is the oxidation number of Cr in Cr2O72−?

Accepted Answer

A)  −12
B)  −7
C)  −2
D)  +6
E)  +7F) B) and D)
G) None of the above

Question 16

Which of these chemical equations describes a precipitation reaction?

Accepted Answer

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

Question 17

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

Accepted Answer

A)  +3
B)  −3
C)  +4
D)  −5
E)  +1F) A) and C)
G) C) and D)

Question 18

Identify the reducing agent in the chemical reaction Cd + NiO2 + 2H2O → Cd(OH) 2 + Ni(OH) 2

Accepted Answer

A)  Cd
B)  NiO2
C)  H2O
D)  Cd(OH) 2
E)  Ni(OH) 2F) A) and B)
G) B) and D)

Question 19

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

Accepted Answer

A)  CuS
B)  Cu2S
C)  NH4NO3
D)  NH4(NO3) 2
E)  CuSO4F) B) and D)
G) A) and B)

Question 20

Which is a representation of a balanced chemical equation for the reaction of nitrogen gas and chlorine gas to form nitrogen trichloride?

Accepted Answer

A)   
B)   
C)   
D)   E) A) and D)
F) A) and C)

Exam 10: Chemical Reactions and Chemical Equations

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

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Suppose aqueous solutions of silver(I) nitrate and potassium chloride are mixed.Which represents the likely result?

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Balance the following equation: Ca3(PO4) 2(s) + SiO2(s) + C(s) → CaSiO3(s) + CO(g) + P4(s)

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

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What is the oxidation number of sulfur in sulfuric acid?

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What is the oxidation number of Cr in Cr2O72−?

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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.) ___ Al + ___ H2SO4 → ___ Al2(SO4) 3 + ___ H2

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

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Which is a representation of a balanced chemical equation for the reaction of nitrogen gas and chlorine gas to form nitrogen trichloride?

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

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Which of these chemical equations describes a precipitation reaction?

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

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Which element is reduced in the following reaction? Cu + 2H2SO4 → CuSO4 + SO2 + 2H2O

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

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Which of these chemical equations describes a metal displacement reaction?

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

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Balance the following equation: C8H18O3(l) + O2(g) → H2O(g) + CO2(g)

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Identify the reducing agent in the chemical reaction Cd + NiO2 + 2H2O → Cd(OH) 2 + Ni(OH) 2

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

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

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

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Balance the following equation: Ca₃(PO₄) ₂(s) + SiO₂(s) + C(s) → CaSiO₃(s) + CO(g) + P₄(s)

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

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What is the oxidation number of Cr in Cr₂O₇²⁻?

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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.) _ Al + _ H₂SO₄ → _ Al₂(SO₄) ₃ + _ H₂

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

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Which element is reduced in the following reaction? Cu + 2H₂SO₄ → CuSO₄ + SO₂ + 2H₂O

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

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Balance the following equation: C₈H₁₈O₃(l) + O₂(g) → H₂O(g) + CO₂(g)

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Identify the reducing agent in the chemical reaction Cd + NiO₂ + 2H₂O → Cd(OH) ₂ + Ni(OH) ₂

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

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