Question 1

Species with positive standard reduction potentials are excellent candidates for reduction reactions.

Accepted Answer

A) True 
 B)False

Question 2

Galvanic corrosion may occur only when two different metals are in contact with one another.

Accepted Answer

A) True 
 B)False  True

Question 3

In the formation of iron (II)  oxide, which species is being reduced?
Fe( s )  + O2( g )  → FeO( s )

Accepted Answer

A)   FeO
B)   Fe2O3
C)   Fe
D)   O2E) A) and B)
F) A) and C) D

Question 4

In the formation of iron (II)  oxide, which species is being reduced?
Fe( s )  + O2( g )  → FeO( s )

Accepted Answer

A)   FeO
B)   Fe2O3
C)   Fe
D)   O2E) C) and D)
F) All of the above

Question 5

How many grams of silver are deposited at a platinum cathode in the electrolysis of AgNO3 (aq)  by 5.30 amps of electric current in 4.0 hours?

Accepted Answer

A)   85.3 g
B)   42.6 g
C)   121 g
D)   188 gE) A) and B)
F) A) and C)

Question 6

Secondary cells are designed to be rechargeable.

Accepted Answer

A) True 
 B)False

Question 7

The rusting witnessed in the sheet metal of a '65 Impala is an example of:

Accepted Answer

A)   uniform corrosion.
B)   galvanic corrosion.
C)   electrolysis.
D)   compounding corrosion.E) A) and B)
F) A) and C)

Question 8

Using the provided standard reduction potentials, which of the following cells is an example of a Galvanic cell?

Accepted Answer

A)   
B)   
C)   
D)   E) All of the above
F) C) and D)

Question 9

What is the E0 value for the Galvanic cell formed from these two half-reactions?
0 value for the Galvanic cell formed from these two half-reactions?   A)  − 2.31 V B)  +4.33 V C)  − 1.32 V D)  +2.00 V" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   − 2.31 V
B)   +4.33 V
C)   − 1.32 V
D)   +2.00 VE) A) and B)
F) None of the above

Question 10

A Galvanic cell is an electrochemical cell in which a spontaneous chemical reaction may be used to generate an electrical current.

Accepted Answer

A) True 
 B)False

Question 11

What is the oxidation number of Mn in MnO4 − ?

Accepted Answer

A)   1+
B)   2+
C)   7+
D)   8+E) All of the above
F) None of the above

Question 12

What is the E0 value for the Galvanic cell formed from these two half-reactions?
0 value for the Galvanic cell formed from these two half-reactions?   A)  +1.334 V B)  − 2.046 V C)  +2.046 V D)  +2.758 V" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   +1.334 V
B)   − 2.046 V
C)   +2.046 V
D)   +2.758 VE) A) and B)
F) A) and C)

Question 13

Balance the following electrochemical reaction in acid:
MnO4 − ( aq )  + Zr( s )  ↔ Mn2+( aq )  + Zr2+( aq )

Accepted Answer

A)   2 MnO4 − ( aq )  + 16H+( aq )  + 5 Zr( s )  → 2 Mn2+( aq )  + 5 Zr2+( aq )  + 8 H2O( l ) 
B)   2 MnO4 − ( aq )  + 5 Zr( s )  → 2 Mn2+( aq )  + 5 Zr2+( aq ) 
C)   MnO4 − ( aq )  + Zr( s )  → Mn2+( aq ) + Zr2+( aq )  + 5 e − 
D)   2 MnO4 − ( aq )  + 8H+( aq )  + 5 Zr( s )  → 2 Mn2+( aq )  + 5 Zr2+( aq )  + 8 H2O( l ) E) A) and C)
F) B) and C)

Question 14

In the decomposition of hydrogen peroxide, which atom is being reduced?
H2O2( aq )  → H2( g )  + O2( g )

Accepted Answer

A)   H
B)   O
C)   both
D)   neitherE) B) and D)
F) B) and C) A

Question 15

The standard hydrogen electrode (SHE) involves gaseous HCl at 1 atm being bubbled into water.

Accepted Answer

A) True 
 B)False

Question 16

The standard state of an electrochemical cell is measured as 1 atm pressure for all gases and 1.0 M for all aqueous solutions.

Accepted Answer

A) True 
 B)False

Question 17

Reduction occurs at the anode of a Galvanic cell.

Accepted Answer

A) True 
 B)False

Question 18

Which phrase best describes the half-reaction as written?
Na+ + e −  → Na

Accepted Answer

A)   oxidation 1/2 reaction
B)   reduction 1/2 reaction
C)   group 2 ionization
D)   two electron transferE) B) and C)
F) A) and D)

Question 19

In a redox reaction:

Accepted Answer

A)   there is a transfer of protons from one species to another.
B)   electrons are created.
C)   electrons are transferred between two species.
D)   the reaction always moves in a reverse direction.E) A) and D)
F) None of the above

Question 20

Given a Galvanic cell:  , the right-hand side of this notation represents the:

Accepted Answer

A)   spontaneous half of the reaction.
B)   oxidation 1/2 reaction.
C)   anode of the cell.
D)   reduction 1/2 reaction.E) None of the above
F) A) and B)

Exam 13: Electrochemistry

Species with positive standard reduction potentials are excellent candidates for reduction reactions.

Correct AnswerverifiedShow Answer

Galvanic corrosion may occur only when two different metals are in contact with one another.

Correct AnswerverifiedTrue

In the formation of iron (II) oxide, which species is being reduced? Fe( s ) + O2( g ) → FeO( s )

Correct AnswerverifiedD

In the formation of iron (II) oxide, which species is being reduced? Fe( s ) + O2( g ) → FeO( s )

Correct AnswerverifiedShow Answer

How many grams of silver are deposited at a platinum cathode in the electrolysis of AgNO3 (aq) by 5.30 amps of electric current in 4.0 hours?

Correct AnswerverifiedShow Answer

Secondary cells are designed to be rechargeable.

Correct AnswerverifiedShow Answer

The rusting witnessed in the sheet metal of a '65 Impala is an example of:

Correct AnswerverifiedShow Answer

Using the provided standard reduction potentials, which of the following cells is an example of a Galvanic cell?

Correct AnswerverifiedShow Answer

What is the E0 value for the Galvanic cell formed from these two half-reactions?

Correct AnswerverifiedShow Answer

A Galvanic cell is an electrochemical cell in which a spontaneous chemical reaction may be used to generate an electrical current.

Correct AnswerverifiedShow Answer

What is the oxidation number of Mn in MnO4 − ?

Correct AnswerverifiedShow Answer

What is the E0 value for the Galvanic cell formed from these two half-reactions?

Correct AnswerverifiedShow Answer

Balance the following electrochemical reaction in acid: MnO4 − ( aq ) + Zr( s ) ↔ Mn2+( aq ) + Zr2+( aq )

Correct AnswerverifiedShow Answer

In the decomposition of hydrogen peroxide, which atom is being reduced? H2O2( aq ) → H2( g ) + O2( g )

Correct AnswerverifiedA

The standard hydrogen electrode (SHE) involves gaseous HCl at 1 atm being bubbled into water.

Correct AnswerverifiedShow Answer

The standard state of an electrochemical cell is measured as 1 atm pressure for all gases and 1.0 M for all aqueous solutions.

Correct AnswerverifiedShow Answer

Reduction occurs at the anode of a Galvanic cell.

Correct AnswerverifiedShow Answer

Which phrase best describes the half-reaction as written? Na+ + e − → Na

Correct AnswerverifiedShow Answer

In a redox reaction:

Correct AnswerverifiedShow Answer

Given a Galvanic cell: , the right-hand side of this notation represents the:

Correct AnswerverifiedShow Answer

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True

In the formation of iron (II) oxide, which species is being reduced? Fe( s ) + O₂( g ) → FeO( s )

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In the formation of iron (II) oxide, which species is being reduced? Fe( s ) + O₂( g ) → FeO( s )

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How many grams of silver are deposited at a platinum cathode in the electrolysis of AgNO₃ (aq) by 5.30 amps of electric current in 4.0 hours?

Correct Answer
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What is the E⁰ value for the Galvanic cell formed from these two half-reactions?

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What is the oxidation number of Mn in MnO₄⁻?

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What is the E⁰ value for the Galvanic cell formed from these two half-reactions?

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Balance the following electrochemical reaction in acid: MnO₄⁻( aq ) + Zr( s ) ↔ Mn²⁺( aq ) + Zr²⁺( aq )

Correct Answer
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In the decomposition of hydrogen peroxide, which atom is being reduced? H₂O₂( aq ) → H₂( g ) + O₂( g )

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A

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Which phrase best describes the half-reaction as written? Na⁺ + e⁻ → Na

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