Question 1

When the following redox equation is balanced using the smallest whole-number coefficients, what is the coefficient of NO2? Sn + HNO3 → SnO2 + NO2 + H2O (acidic solution)

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  5F) B) and D)
G) B) and C)

Question 2

Consider the following balanced redox reaction. Mn2+(aq)  + S2O82−(aq)  + 2H2O(l)  → MnO2(s)  + 4H+(aq)  + 2SO42−(aq)  Which of the following statements is ?

Accepted Answer

A)  Mn2+(aq)  is the oxidizing agent and is reduced.
B)  Mn2+(aq)  is the oxidizing agent and is oxidized.
C)  Mn2+(aq)  is the reducing agent and is oxidized.
D)  Mn2+(aq)  is the reducing agent and is reduced.
E)  Manganese does not change its oxidation number in this reaction.F) B) and E)
G) A) and B)

Question 3

If a substance is reduced, it must undergo a

Accepted Answer

A)  gain of electrons.
B)  loss of oxygen.
C)  gain of hydrogen.
D)  loss of electrons.
E)  gain of oxygen.F) None of the above
G) All of the above

Question 4

When the following redox equation is balanced with the smallest whole number coefficients, what is the coefficient of Sb3+(aq) ? BrO3−(aq)  + Sb3+(aq)  → Br−(aq)  + Sb5+(aq)  (acidic solution)

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  6F) A) and E)
G) C) and D)

Question 5

When the following equation is balanced with the lowest whole number coefficients, the coefficients are:Cu(s)  + H+(aq)  + NO3−(aq)  → NO(g)  + H2O(l)  + Cu2+(aq)

Accepted Answer

A)  1, 2, 1, 1, 1, 1
B)  3, 2, 1, 1, 1, 3
C)  3, 2, 4, 2, 4, 3
D)  1, 8, 2, 2, 4, 1
E)  3, 8, 2, 2, 4, 3F) C) and D)
G) B) and D)

Question 6

What is the oxidizing agent in the (unbalanced)  reaction? Cu(s)  + H+(aq)  + NO3−(aq)  → NO(g)  + H2O(l)  + Cu2+(aq)

Accepted Answer

A)  Cu
B)  H+
C)  NO3−
D)  NO
E)  Cu2+F) A) and D)
G) A) and C)

Question 7

Which is the correct cell notation for the following reaction? Au3+(aq)  + Al(s)  → Al3+(aq)  + Au(s)

Accepted Answer

A)  Al3+(aq) |Al(s) ||Au3+(aq) |Au(s) 
B)  Al(s) |Al3+(aq) ||Au3+(aq) |Au(s) 
C)  Al3+(aq) |Au3+(aq) ||Al(s) |Au(s) 
D)  Al3+(aq) |Au(s) ||Au3+(aq) |Al(s) 
E)  Au(s) |Al(s) ||Au3+(aq) |Al3+(aq) F) A) and E)
G) A) and D)

Question 8

What is the purpose of a salt bridge in an electrochemical cell?

Accepted Answer

A)  A salt bridge provides electrical contact between the electrodes that make up the cell.
B)  A salt bridge carries electrons between the cathode and anode.
C)  A salt bridge insulates the two electrodes.
D)  A salt bridge allows the electrolyte solution to siphon from one side of the cell to the other so the levels remainEqual.
E)  A salt bridge allows electrolyte to flow from one half-cell to the other in order to maintain electroneutrality.F) D) and E)
G) B) and E)

Question 9

What is the name given to the experimental apparatus for generating electricity through the use of a spontaneous reaction?

Accepted Answer

A)  Electrolytic cell
B)  Galvanic cell
C)  Redox cell
D)  Cathode
E)  AnodeF) A) and B)
G) B) and E)

Question 10

Iron objects such as storage tanks and underground pipelines can be protected from corrosion by connecting them through a wire to a piece of

Accepted Answer

A)  Pb.
B)  Ag.
C)  Sn.
D)  Mg.
E)  Cu.F) B) and C)
G) A) and B)

Exam 17: Electrochemistry

What is the purpose of a salt bridge in an electrochemical cell?

Correct Answer
verified

Consider the following balanced redox reaction. Mn²⁺(aq) + S₂O8²⁻(aq) + 2H₂O(l) → MnO₂(s) + 4H⁺(aq) + 2SO₄²⁻(aq) Which of the following statements is ?

Correct Answer
verified

When the following redox equation is balanced with the smallest whole number coefficients, what is the coefficient of Sb³⁺(aq) ? BrO₃⁻(aq) + Sb³⁺(aq) → Br⁻(aq) + Sb⁵⁺(aq) (acidic solution)

Correct Answer
verified

What is the oxidizing agent in the (unbalanced) reaction? Cu(s) + H⁺(aq) + NO₃⁻(aq) → NO(g) + H₂O(l) + Cu²⁺(aq)

Correct Answer
verified

When the following redox equation is balanced using the smallest whole-number coefficients, what is the coefficient of NO₂? Sn + HNO₃ → SnO₂ + NO₂ + H₂O (acidic solution)

Correct Answer
verified

Iron objects such as storage tanks and underground pipelines can be protected from corrosion by connecting them through a wire to a piece of

Correct Answer
verified

When the following equation is balanced with the lowest whole number coefficients, the coefficients are:Cu(s) + H⁺(aq) + NO₃⁻(aq) → NO(g) + H₂O(l) + Cu²⁺(aq)

Correct Answer
verified

If a substance is reduced, it must undergo a

Correct Answer
verified

What is the name given to the experimental apparatus for generating electricity through the use of a spontaneous reaction?

Correct Answer
verified

Which is the correct cell notation for the following reaction? Au³⁺(aq) + Al(s) → Al³⁺(aq) + Au(s)

Correct Answer
verified

Exam 17: Electrochemistry

What is the purpose of a salt bridge in an electrochemical cell?

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Consider the following balanced redox reaction. Mn2+(aq) + S2O82−(aq) + 2H2O(l) → MnO2(s) + 4H+(aq) + 2SO42−(aq) Which of the following statements is ?

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When the following redox equation is balanced with the smallest whole number coefficients, what is the coefficient of Sb3+(aq) ? BrO3−(aq) + Sb3+(aq) → Br−(aq) + Sb5+(aq) (acidic solution)

Correct AnswerverifiedShow Answer

What is the oxidizing agent in the (unbalanced) reaction? Cu(s) + H+(aq) + NO3−(aq) → NO(g) + H2O(l) + Cu2+(aq)

Correct AnswerverifiedShow Answer

When the following redox equation is balanced using the smallest whole-number coefficients, what is the coefficient of NO2? Sn + HNO3 → SnO2 + NO2 + H2O (acidic solution)

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Iron objects such as storage tanks and underground pipelines can be protected from corrosion by connecting them through a wire to a piece of

Correct AnswerverifiedShow Answer

When the following equation is balanced with the lowest whole number coefficients, the coefficients are:Cu(s) + H+(aq) + NO3−(aq) → NO(g) + H2O(l) + Cu2+(aq)

Correct AnswerverifiedShow Answer

If a substance is reduced, it must undergo a

Correct AnswerverifiedShow Answer

What is the name given to the experimental apparatus for generating electricity through the use of a spontaneous reaction?

Correct AnswerverifiedShow Answer

Which is the correct cell notation for the following reaction? Au3+(aq) + Al(s) → Al3+(aq) + Au(s)

Correct AnswerverifiedShow Answer

Correct Answer
verified

Consider the following balanced redox reaction. Mn²⁺(aq) + S₂O8²⁻(aq) + 2H₂O(l) → MnO₂(s) + 4H⁺(aq) + 2SO₄²⁻(aq) Which of the following statements is ?

Correct Answer
verified

When the following redox equation is balanced with the smallest whole number coefficients, what is the coefficient of Sb³⁺(aq) ? BrO₃⁻(aq) + Sb³⁺(aq) → Br⁻(aq) + Sb⁵⁺(aq) (acidic solution)

Correct Answer
verified

What is the oxidizing agent in the (unbalanced) reaction? Cu(s) + H⁺(aq) + NO₃⁻(aq) → NO(g) + H₂O(l) + Cu²⁺(aq)

Correct Answer
verified

When the following redox equation is balanced using the smallest whole-number coefficients, what is the coefficient of NO₂? Sn + HNO₃ → SnO₂ + NO₂ + H₂O (acidic solution)

Correct Answer
verified

Correct Answer
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When the following equation is balanced with the lowest whole number coefficients, the coefficients are:Cu(s) + H⁺(aq) + NO₃⁻(aq) → NO(g) + H₂O(l) + Cu²⁺(aq)

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Which is the correct cell notation for the following reaction? Au³⁺(aq) + Al(s) → Al³⁺(aq) + Au(s)

Correct Answer
verified