Question 1

A voltaic cell prepared using aluminum and nickel has the following cell notation.
Al(s) | Al3+(aq) || Ni2+(aq) | Ni(s) 
Which of the following reactions occurs at the anode?

Accepted Answer

A)  Al(s)   →	o→  Al3+(aq) + 3e-
B)  Al3+(aq) + 3e  →	o→  Al(s) 
C)  Ni(s)   →	o→ Ni2+(aq) + 2e-
D)  Ni2+(aq) + 2e-  →	o→  Ni(s) 
E)  None of these choices are correct. F) A) and B)
G) C) and E)

Question 2

What is the E°cell for the cell represented by the combination of the following half-reactions?
2Hg2+(aq) + 2e- cell for the cell represented by the combination of the following half-reactions? 2Hg2+(aq) + 2e-   Hg22+(aq) ;E°= 0.92 V Cr3+ (aq) + 3e-   Cr(s) ;E°= -0.74 V A) -0.18 V B) 0.18 V C) 1.28 V D) 1.66 V E) 2.12 V" class="answers-bank-image d-inline" rel="preload" >
Hg22+(aq) ;E°= 0.92 V
Cr3+ (aq) + 3e- cell for the cell represented by the combination of the following half-reactions? 2Hg2+(aq) + 2e-   Hg22+(aq) ;E°= 0.92 V Cr3+ (aq) + 3e-   Cr(s) ;E°= -0.74 V A) -0.18 V B) 0.18 V C) 1.28 V D) 1.66 V E) 2.12 V" class="answers-bank-image d-inline" rel="preload" >
Cr(s) ;E°= -0.74 V

Accepted Answer

A)  -0.18 V
B)  0.18 V
C)  1.28 V
D)  1.66 V
E)  2.12 VF) B) and E)
G) A) and B)

Question 3

A much-studied cell in electrochemistry has the following cell notation:
Ag(s)| AgCl(s)| HCl(aq)| H2(g)| Pt(s)
Bearing in mind that HCl(aq)consists of H+(aq)and Cl-(aq),and that this solution is in contact with both electrodes (there is no salt bridge),write down balanced equations for
a.the anode half-reaction.
b.the cathode half-reaction.
c.the cell reaction.

Accepted Answer

a.Ag(s)+ Cl^-(aq)

A...

Question 4

When the following redox equation is balanced with smallest whole number coefficients,the coefficient for zinc will be _____.
Zn(s) + ReO4-(aq)   →	o→  Re(s) + Zn2+(aq) (acidic solution)

Accepted Answer

A)  2
B)  7
C)  8
D)  16
E)  None of these choices is correct. F) A) and B)
G) B) and E)

Question 5

Explain what is meant by a fuel cell.Provide a balanced equation to represent the reaction in any fuel cell of your choice.

Accepted Answer

A fuel cell is a voltaic cell in which t...

Question 6

What mass of silver will be formed when 15.0 A are passed through molten AgCl for 25.0 minutes?

Accepted Answer

A)  0.419 g
B)  6.29 g
C)  12.6 g
D)  25.2 g
E)  33.4 gF) B) and E)
G) All of the above

Question 7

In the shorthand notation for cells,a single vertical line represents a salt bridge.

Accepted Answer

A) True 
 B)False

Question 8

A voltaic cell prepared using aluminum and nickel has the following cell notation.
Al(s) | Al3+(aq) || Ni2+(aq) | Ni(s) 
Which of the following represents the correctly balanced spontaneous reaction equation for the cell?

Accepted Answer

A)  Ni2+(aq) + Al(s)   →	o→  Al3+(aq) + Ni(s) 
B)  3Ni2+(aq) + 2Al(s)   →	o→ 2Al3+(aq) + 3Ni(s) 
C)  Ni(s) + Al3+(aq)   →	o→ Ni2+(aq) + Al(s) 
D)  3Ni(s) + 2Al3+(aq)    →	o→  3Ni2+(aq) + 2Al(s) 
E)  None of these choices is correct. F) A) and E)
G) C) and D)

Question 9

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

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) A) and B)
G) A) and C)

Question 10

Which,if any,of the following metals would be capable of acting as a sacrificial anode when used with iron pipe? E°Fe = -0.44 V;all E° values refer to the M2+/M half-cell reactions.

Accepted Answer

A)  copper,Cu,E° = 0.15 V
B)  cobalt,Co,E° = -0.28 V
C)  chromium,Cr,E° = -0.74 V
D)  tin,Sn,E° = -0.14 V
E)  None of these metals would be capable of acting as a sacrificial anode with iron.F) All of the above
G) None of the above

Question 11

a.Write a balanced equation to represent the overall reaction you would expect to occur in the electrolysis of molten KCl.
b.Write a balanced equation to represent the overall reaction you would expect to occur in the electrolysis of aqueous KCl.
c.Clearly explain why the products of the two processes are not the same.

Accepted Answer

a.2KCl(l) \(\to\0 2K(l)+ Cl₂( ...

Question 12

Calculate E°cell and indicate whether the overall reaction shown is spontaneous or nonspontaneous.
O2(g) + 4H+(aq) + 4e- cell and indicate whether the overall reaction shown is spontaneous or nonspontaneous. O2(g) + 4H+(aq) + 4e-   2H2O(l) ;E° = 1.229 V Al3+(aq) + 3e-   Al(s) ;E° = -1.662 V Overall reaction: 4Al(s) + 3O2(g) + 12H+(aq)   	o  4Al3+(aq) + 6H2O(l)  A) E°cell = -2.891 V,nonspontaneous B) E°cell = -2.891 V,spontaneous C) E°cell = 2.891 V,nonspontaneous D) E°cell = 2.891 V,spontaneous E) Spontaneous,but none of these values of E°cell is correct. " class="answers-bank-image d-inline" rel="preload" >
2H2O(l) ;E° = 1.229 V
Al3+(aq) + 3e- cell and indicate whether the overall reaction shown is spontaneous or nonspontaneous. O2(g) + 4H+(aq) + 4e-   2H2O(l) ;E° = 1.229 V Al3+(aq) + 3e-   Al(s) ;E° = -1.662 V Overall reaction: 4Al(s) + 3O2(g) + 12H+(aq)   	o  4Al3+(aq) + 6H2O(l)  A) E°cell = -2.891 V,nonspontaneous B) E°cell = -2.891 V,spontaneous C) E°cell = 2.891 V,nonspontaneous D) E°cell = 2.891 V,spontaneous E) Spontaneous,but none of these values of E°cell is correct. " class="answers-bank-image d-inline" rel="preload" >
Al(s) ;E° = -1.662 V
Overall reaction:
4Al(s) + 3O2(g) + 12H+(aq)   →	o→  4Al3+(aq) + 6H2O(l)

Accepted Answer

A)  E°cell = -2.891 V,nonspontaneous
B)  E°cell = -2.891 V,spontaneous
C)  E°cell = 2.891 V,nonspontaneous
D)  E°cell = 2.891 V,spontaneous
E)  Spontaneous,but none of these values of E°cell is correct. F) A) and E)
G) A) and D)

Question 13

Which one of the following statements about electrochemical cells is correct?

Accepted Answer

A)  In a salt bridge,current is carried by cations moving toward the anode,and anions toward the cathode.
B)  In the external wire,electrons travel from cathode to anode.
C)  The anode of a voltaic cell is labeled minus (-) .
D)  Oxidation occurs at the cathode,in an electrolytic cell.
E)  None of these statements is correct.F) A) and E)
G) B) and D)

Question 14

Electrons are produced at the cathode of a voltaic cell.

Accepted Answer

A) True 
 B)False

Question 15

What is the value of the equilibrium constant for the cell reaction below at 25°C? E°cell = 0.61 V
2Cr(s) + 3Pb2+(aq)  cell = 0.61 V 2Cr(s) + 3Pb2+(aq)    3Pb(s) + 2Cr3+(aq)  A) 4.1  	imes  1020 B) 8.2  	imes  1030 C) 3.3  	imes  1051 D) 7.4  	imes  1061 E) > 9.9  	imes  1099 " class="answers-bank-image d-inline" rel="preload" >
3Pb(s) + 2Cr3+(aq)

Accepted Answer

A)  4.1  ×	imes×  1020
B)  8.2  ×	imes×  1030
C)  3.3  ×	imes×  1051
D)  7.4  ×	imes×  1061
E)  > 9.9  ×	imes×  1099 F) A) and D)
G) B) and E)

Question 16

A current of 250.A flows for 24.0 hours at an anode where the reaction occurring is
Mn2+(aq) + 2H2O(l)   →	o→  MnO2(s) + 4H+(aq) + 2e-
 What mass of MnO2 is deposited at this anode?

Accepted Answer

A)  19.5 kg
B)  12.9 kg
C)  4.87 kg
D)  2.43 kg
E)  None of these choices is correct. F) A) and B)
G) A) and C)

Question 17

A salt bridge provides a path for electrons to move between the anode and cathode compartments of a voltaic cell.

Accepted Answer

A) True 
 B)False

Question 18

When the following redox equation is balanced with smallest whole number coefficients,the coefficient for the iodide ion will be _____.
I-(aq) + NO3-(aq)   →	o→  NO(g) + I2(s) (acidic solution)

Accepted Answer

A)  2
B)  3
C)  6
D)  8
E)  None of these choices is correct. F) A) and C)
G) A) and B)

Question 19

Which of the following conditions is most likely to apply to a fully-charged secondary cell?

Accepted Answer

A)  Ecell = E°cell
B)  E°cell = 0
C)  Q = 1
D)  Q 
E)  Q =KF) A) and B)
G) A) and C)

Question 20

When the following redox equation is balanced with smallest whole number coefficients,the coefficient for Sn(OH) 3- will be _____.
Bi(OH) 3(s) + Sn(OH) 3-(aq)   →	o→  Sn(OH) 62-(aq) + Bi(s) (basic solution)

Accepted Answer

A)  1
B)  2
C)  3
D)  6
E)  None of these choices is correct. F) A) and E)
G) B) and E)

Exam 21: Electrochemistry: Chemical Change and Electrical Work

Which of the following conditions is most likely to apply to a fully-charged secondary cell?

Correct Answer
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Correct Answer
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A salt bridge provides a path for electrons to move between the anode and cathode compartments of a voltaic cell.

Correct Answer
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A voltaic cell prepared using aluminum and nickel has the following cell notation. Al(s) | Al³⁺(aq) || Ni²⁺(aq) | Ni(s) Which of the following represents the correctly balanced spontaneous reaction equation for the cell?

Correct Answer
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Which,if any,of the following metals would be capable of acting as a sacrificial anode when used with iron pipe? E°_Fe = -0.44 V;all E° values refer to the M²⁺/M half-cell reactions.

Correct Answer
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When the following redox equation is balanced with smallest whole number coefficients,the coefficient for Sn(OH) ₃^- will be _____. Bi(OH) ₃(s) + Sn(OH) ₃^-(aq) $\to$ Sn(OH) ₆^2-(aq) + Bi(s) (basic solution)

Correct Answer
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Correct Answer
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a.2KCl(l) \(\to\0 2K(l)+ Cl₂( ...
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A current of 250.A flows for 24.0 hours at an anode where the reaction occurring is Mn²⁺(aq) + 2H₂O(l) $\to$ MnO₂(s) + 4H⁺(aq) + 2e^- What mass of MnO₂ is deposited at this anode?

Correct Answer
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When the following redox equation is balanced with smallest whole number coefficients,the coefficient for zinc will be _____. Zn(s) + ReO₄^-(aq) $\to$ Re(s) + Zn²⁺(aq) (acidic solution)

Correct Answer
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Consider the following balanced redox reaction Mn²⁺(aq) + S₂O₈^2-(aq) + 2H₂O(l) $\to$ MnO₂(s) + 4H⁺(aq) + 2SO₄^2-(aq) Which of the following statements is true?

Correct Answer
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When the following redox equation is balanced with smallest whole number coefficients,the coefficient for the iodide ion will be _____. I^-(aq) + NO₃^-(aq) $\to$ NO(g) + I₂(s) (acidic solution)

Correct Answer
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Explain what is meant by a fuel cell.Provide a balanced equation to represent the reaction in any fuel cell of your choice.

Correct Answer
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A fuel cell is a voltaic cell in which t...
View Answer

Electrons are produced at the cathode of a voltaic cell.

Correct Answer
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A voltaic cell prepared using aluminum and nickel has the following cell notation. Al(s) | Al³⁺(aq) || Ni²⁺(aq) | Ni(s) Which of the following reactions occurs at the anode?

Correct Answer
verified

Correct Answer
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What is the E°_cell for the cell represented by the combination of the following half-reactions? 2Hg²⁺(aq) + 2e^- Hg₂²⁺(aq) ;E°= 0.92 V Cr³⁺ (aq) + 3e^- Cr(s) ;E°= -0.74 V

Correct Answer
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What mass of silver will be formed when 15.0 A are passed through molten AgCl for 25.0 minutes?

Correct Answer
verified

Which one of the following statements about electrochemical cells is correct?

Correct Answer
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In the shorthand notation for cells,a single vertical line represents a salt bridge.

Correct Answer
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Correct Answer
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a.Ag(s)+ Cl^-(aq) A...
View Answer

Exam 21: Electrochemistry: Chemical Change and Electrical Work

Which of the following conditions is most likely to apply to a fully-charged secondary cell?

Correct AnswerverifiedShow Answer

What is the value of the equilibrium constant for the cell reaction below at 25°C? E°cell = 0.61 V 2Cr(s) + 3Pb2+(aq) 3Pb(s) + 2Cr3+(aq)

Correct AnswerverifiedShow Answer

A salt bridge provides a path for electrons to move between the anode and cathode compartments of a voltaic cell.

Correct AnswerverifiedShow Answer

A voltaic cell prepared using aluminum and nickel has the following cell notation. Al(s) | Al3+(aq) || Ni2+(aq) | Ni(s) Which of the following represents the correctly balanced spontaneous reaction equation for the cell?

Correct AnswerverifiedShow Answer

Which,if any,of the following metals would be capable of acting as a sacrificial anode when used with iron pipe? E°Fe = -0.44 V;all E° values refer to the M2+/M half-cell reactions.

Correct AnswerverifiedShow Answer

When the following redox equation is balanced with smallest whole number coefficients,the coefficient for Sn(OH) 3- will be _____. Bi(OH) 3(s) + Sn(OH) 3-(aq) →\to→ Sn(OH) 62-(aq) + Bi(s) (basic solution)

Correct AnswerverifiedShow Answer

Correct Answerverified a.2KCl(l) \(\to\0 2K(l)+ Cl2( ...View AnswerShow Answer

A current of 250.A flows for 24.0 hours at an anode where the reaction occurring is Mn2+(aq) + 2H2O(l) →\to→ MnO2(s) + 4H+(aq) + 2e- What mass of MnO2 is deposited at this anode?

Correct AnswerverifiedShow Answer

When the following redox equation is balanced with smallest whole number coefficients,the coefficient for zinc will be _____. Zn(s) + ReO4-(aq) →\to→ Re(s) + Zn2+(aq) (acidic solution)

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

When the following redox equation is balanced with smallest whole number coefficients,the coefficient for the iodide ion will be _____. I-(aq) + NO3-(aq) →\to→ NO(g) + I2(s) (acidic solution)

Correct AnswerverifiedShow Answer

Explain what is meant by a fuel cell.Provide a balanced equation to represent the reaction in any fuel cell of your choice.

Correct AnswerverifiedA fuel cell is a voltaic cell in which t...View AnswerShow Answer

Electrons are produced at the cathode of a voltaic cell.

Correct AnswerverifiedShow Answer

A voltaic cell prepared using aluminum and nickel has the following cell notation. Al(s) | Al3+(aq) || Ni2+(aq) | Ni(s) Which of the following reactions occurs at the anode?

Correct AnswerverifiedShow Answer

Calculate E°cell and indicate whether the overall reaction shown is spontaneous or nonspontaneous. O2(g) + 4H+(aq) + 4e- 2H2O(l) ;E° = 1.229 V Al3+(aq) + 3e- Al(s) ;E° = -1.662 V Overall reaction: 4Al(s) + 3O2(g) + 12H+(aq) →\to→ 4Al3+(aq) + 6H2O(l)

Correct AnswerverifiedShow Answer

What is the E°cell for the cell represented by the combination of the following half-reactions? 2Hg2+(aq) + 2e- Hg22+(aq) ;E°= 0.92 V Cr3+ (aq) + 3e- Cr(s) ;E°= -0.74 V

Correct AnswerverifiedShow Answer

What mass of silver will be formed when 15.0 A are passed through molten AgCl for 25.0 minutes?

Correct AnswerverifiedShow Answer

Which one of the following statements about electrochemical cells is correct?

Correct AnswerverifiedShow Answer

In the shorthand notation for cells,a single vertical line represents a salt bridge.

Correct AnswerverifiedShow Answer

Correct Answerverifieda.Ag(s)+ Cl-(aq) A...View AnswerShow Answer

Correct Answer
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Correct Answer
verified

Correct Answer
verified

A voltaic cell prepared using aluminum and nickel has the following cell notation. Al(s) | Al³⁺(aq) || Ni²⁺(aq) | Ni(s) Which of the following represents the correctly balanced spontaneous reaction equation for the cell?

Correct Answer
verified

Which,if any,of the following metals would be capable of acting as a sacrificial anode when used with iron pipe? E°_Fe = -0.44 V;all E° values refer to the M²⁺/M half-cell reactions.

Correct Answer
verified

When the following redox equation is balanced with smallest whole number coefficients,the coefficient for Sn(OH) ₃^- will be _____. Bi(OH) ₃(s) + Sn(OH) ₃^-(aq) $\to$ Sn(OH) ₆^2-(aq) + Bi(s) (basic solution)

Correct Answer
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Correct Answer
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a.2KCl(l) \(\to\0 2K(l)+ Cl₂( ...
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A current of 250.A flows for 24.0 hours at an anode where the reaction occurring is Mn²⁺(aq) + 2H₂O(l) $\to$ MnO₂(s) + 4H⁺(aq) + 2e^- What mass of MnO₂ is deposited at this anode?

Correct Answer
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When the following redox equation is balanced with smallest whole number coefficients,the coefficient for zinc will be _____. Zn(s) + ReO₄^-(aq) $\to$ Re(s) + Zn²⁺(aq) (acidic solution)

Correct Answer
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Consider the following balanced redox reaction Mn²⁺(aq) + S₂O₈^2-(aq) + 2H₂O(l) $\to$ MnO₂(s) + 4H⁺(aq) + 2SO₄^2-(aq) Which of the following statements is true?

Correct Answer
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When the following redox equation is balanced with smallest whole number coefficients,the coefficient for the iodide ion will be _____. I^-(aq) + NO₃^-(aq) $\to$ NO(g) + I₂(s) (acidic solution)

Correct Answer
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Correct Answer
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A fuel cell is a voltaic cell in which t...
View Answer

Correct Answer
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A voltaic cell prepared using aluminum and nickel has the following cell notation. Al(s) | Al³⁺(aq) || Ni²⁺(aq) | Ni(s) Which of the following reactions occurs at the anode?

Correct Answer
verified

Correct Answer
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What is the E°_cell for the cell represented by the combination of the following half-reactions? 2Hg²⁺(aq) + 2e^- Hg₂²⁺(aq) ;E°= 0.92 V Cr³⁺ (aq) + 3e^- Cr(s) ;E°= -0.74 V

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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a.Ag(s)+ Cl^-(aq) A...
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