Question 1

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. 
A) gain of electrons. 
B) loss of oxygen. 
C) gain of hydrogen. 
D) loss of electrons. 
E) gain of oxygen.

Question 2

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

Question 3

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) Anode 
A) Electrolytic cell 
B) Galvanic cell 
C) Redox cell 
D) Cathode 
E) Anode

Question 4

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

Question 5

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

Question 6

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

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) 
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)

Question 8

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. 
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.

Question 9

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 remain
Equal. 
E) A salt bridge allows electrolyte to flow from one half-cell to the other in order to maintain electroneutrality. 
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 remain
Equal. 
E) A salt bridge allows electrolyte to flow from one half-cell to the other in order to maintain electroneutrality.

Question 10

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, 3 
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, 3

If a substance is reduced, it must undergo a

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

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

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

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)

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)

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

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

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

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)

Atoms and Elements

Electrons and the Periodic Table

Compounds and Chemical Bonds

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The Mole and Chemical Formulas

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Using Balanced Chemical Equations

Acids and Bases

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Exam 17: Electrochemistry

If a substance is reduced, it must undergo a

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

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

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

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)

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)

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

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

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

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)

Atoms and Elements

Electrons and the Periodic Table

Compounds and Chemical Bonds

How Chemists Use Numbers

The Mole and Chemical Formulas

Molecular Shape

Solids, Liquids, and Phase Changes

Gases

Physical Properties of Solutions

Chemical Reactions and Chemical Equations

Using Balanced Chemical Equations

Acids and Bases

Equilibrium

Organic Chemistry

Biochemistry

Nuclear Chemistry

Filters

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

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)

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)

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

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

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)