Question 1

What is E°cell for the following reaction? Al(s) + 3Ag+(aq) → Al3+(aq) + 3Ag(s)

Accepted Answer

A)  -2.46 V 
B)  0.86 V 
C)  -0.86 V 
D)  2.46 V 
E)  4.06 V 
A)  -2.46 V 
B)  0.86 V 
C)  -0.86 V 
D)  2.46 V 
E)  4.06 V

Question 2

In a fuel cell, an external source of electrical power is used to drive a nonspontaneous reaction in which a fuel is produced.

Accepted Answer

A) True 
 B)False

Question 3

Which electrochemical cell pictured below corresponds to the following cell diagram? Cr(s) | Cr3+(aq, 1.0 M) || Sn2+(aq, 1.0 M) | Sn(s)

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 4

Predict the products obtained from the electrolysis of a 1 M AlBr3 solution.

Accepted Answer

A)  Al and Br2 
B)  Al and O2 
C)  H2 and O2 
D)  H2 and Br2 
E)  Al and H2 
A)  Al and Br2 
B)  Al and O2 
C)  H2 and O2 
D)  H2 and Br2 
E)  Al and H2

Question 5

An electroplating solution is made up of nickel(II) sulfate. How much time would it take to deposit 0.500 g of metallic nickel on a custom car part using a current of 3.00 A?

Accepted Answer

9.13 min o

Question 6

When the following redox equation is balanced with the smallest whole number coefficients, the coefficient for the hydrogen sulfate ion will be ________. Al(s) + HSO4-(aq) + OH-(aq) → Al2O3(s) + S2-(aq) + H2O(l)

Accepted Answer

A)  1 
B)  3 
C)  4 
D)  6 
E)  8 
A)  1 
B)  3 
C)  4 
D)  6 
E)  8

Question 7

A voltaic cell consists of a Mn/Mn2+ electrode (E° = -1.18 V) and a Fe/Fe2+ electrode (E° = -0.44 V). Calculate [Fe2+] if [Mn2+] = 0.050 M and Ecell = 0.78 V at 25°C.

Accepted Answer

A)  0.040 M 
B)  0.24 M 
C)  1.1 M 
D)  1.8 M 
E)  None of these choices is correct. 
A)  0.040 M 
B)  0.24 M 
C)  1.1 M 
D)  1.8 M 
E)  None of these choices is correct.

Question 8

What is the name of a galvanic cell that requires a continuous supply of reactants to keep functioning?

Accepted Answer

The answer of What is the name of a galvanic...

Question 9

When the following redox equation is balanced with the smallest whole number coefficients, what is the coefficient for nitrogen dioxide? I2(s) + HNO3(aq) → HIO3(aq) + NO2(g) + H2O(l)

Accepted Answer

A)  1 
B)  2 
C)  4 
D)  5 
E)  10 
A)  1 
B)  2 
C)  4 
D)  5 
E)  10

Question 10

Which is the Nernst equation?

Accepted Answer

A)    
B)    
C)    
D)    
E)  None of these statements is correct. 
A)    
B)    
C)    
D)    
E)  None of these statements is correct.

Question 11

What is E°cell for the reaction of nickel(II) ions with cadmium metal at 25°C? (R = 8.314 J/K • mol, F = 96,500 C • mol -1)

Accepted Answer

A)  0.0750 V 
B)  0.100 V 
C)  0.120 V 
D)  0.150 V 
E)  0.300 V 
A)  0.0750 V 
B)  0.100 V 
C)  0.120 V 
D)  0.150 V 
E)  0.300 V

Question 12

Which is incorrect?

Accepted Answer

A) At equilibrium, Ecell = 0. B) E > 0 for a spontaneous process. C) E = 0 for a spontaneous process. D) ΔG < 0 for a spontaneous process. E) ΔG = 0 at equilibrium. A) At equilibrium, Ecell = 0. B) E > 0 for a spontaneous process. C) E = 0 for a spontaneous process. D) ΔG < 0 for a spontaneous process. E) ΔG = 0 at equilibrium.

Question 13

Consider the reaction of iodine with manganese dioxide. 3I2(s) + 2MnO2(s) + 8OH-(aq)   6I-(aq) + 2MnO4-(aq) + 4H2O(l)
The equilibrium constant for the overall reaction is 8.3 × 10-7. What is E°cell for the reaction at 25°C? (R = 8.314 J/K • mol, F = 96,500 C • mol-1)

Accepted Answer

A)  -0.36 V 
B)  -0.18 V 
C)  -0.12 V 
D)  -0.060 V 
E)  +0.12 V 
A)  -0.36 V 
B)  -0.18 V 
C)  -0.12 V 
D)  -0.060 V 
E)  +0.12 V

Question 14

Consider the reaction CuO(s) + H2(g) → Cu(s) + H2O(l)
In this reaction, which substances are the oxidizing agent and reducing agent, respectively?

Accepted Answer

A)  CuO and H2 
B)  H2 and CuO 
C)  CuO and Cu 
D)  H2O and H2 
E)  Cu and H2O 
A)  CuO and H2 
B)  H2 and CuO 
C)  CuO and Cu 
D)  H2O and H2 
E)  Cu and H2O

Question 15

A current of 250. A flows for 24.0 hours at an anode where the reaction occurring is as follows: Mn2+(aq) + 2H2O(l) → 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)  9.73 kg 
D)  4.87 kg 
E)  2.43 kg 
A)  19.5 kg 
B)  12.9 kg 
C)  9.73 kg 
D)  4.87 kg 
E)  2.43 kg

Question 16

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 17

Which metal is not capable of acting as a sacrificial anode when used with iron pipe?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 18

What is the name given to the experimental apparatus for generating electricity through the use of a spontaneous redox 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 19

Complete and balance the following redox equation. When properly balanced using the smallest whole-number coefficients, the coefficient of S is H2S + HNO3 → S + NO + H2O (acidic solution)

Accepted Answer

A)  1. 
B)  2. 
C)  3. 
D)  5. 
E)  6. 
A)  1. 
B)  2. 
C)  3. 
D)  5. 
E)  6.

Question 20

A lead-storage battery is not rechargeable.

Accepted Answer

A) True 
 B)False

Exam 19: Electrochemistry

What is E°cell for the following reaction? Al(s) + 3Ag+(aq) → Al3+(aq) + 3Ag(s)

In a fuel cell, an external source of electrical power is used to drive a nonspontaneous reaction in which a fuel is produced.

Which electrochemical cell pictured below corresponds to the following cell diagram? Cr(s) | Cr3+(aq, 1.0 M) || Sn2+(aq, 1.0 M) | Sn(s)

Predict the products obtained from the electrolysis of a 1 M AlBr3 solution.

An electroplating solution is made up of nickel(II) sulfate. How much time would it take to deposit 0.500 g of metallic nickel on a custom car part using a current of 3.00 A?

When the following redox equation is balanced with the smallest whole number coefficients, the coefficient for the hydrogen sulfate ion will be ________. Al(s) + HSO4-(aq) + OH-(aq) → Al2O3(s) + S2-(aq) + H2O(l)

A voltaic cell consists of a Mn/Mn2+ electrode (E° = -1.18 V) and a Fe/Fe2+ electrode (E° = -0.44 V). Calculate [Fe2+] if [Mn2+] = 0.050 M and Ecell = 0.78 V at 25°C.

What is the name of a galvanic cell that requires a continuous supply of reactants to keep functioning?

When the following redox equation is balanced with the smallest whole number coefficients, what is the coefficient for nitrogen dioxide? I2(s) + HNO3(aq) → HIO3(aq) + NO2(g) + H2O(l)

Which is the Nernst equation?

What is E°cell for the reaction of nickel(II) ions with cadmium metal at 25°C? (R = 8.314 J/K • mol, F = 96,500 C • mol -1)

Which is incorrect?

Consider the reaction of iodine with manganese dioxide. 3I2(s) + 2MnO2(s) + 8OH-(aq) 6I-(aq) + 2MnO4-(aq) + 4H2O(l) The equilibrium constant for the overall reaction is 8.3 × 10-7. What is E°cell for the reaction at 25°C? (R = 8.314 J/K • mol, F = 96,500 C • mol-1)

Consider the reaction CuO(s) + H2(g) → Cu(s) + H2O(l) In this reaction, which substances are the oxidizing agent and reducing agent, respectively?

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

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 metal is not capable of acting as a sacrificial anode when used with iron pipe?

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

Complete and balance the following redox equation. When properly balanced using the smallest whole-number coefficients, the coefficient of S is H2S + HNO3 → S + NO + H2O (acidic solution)

A lead-storage battery is not rechargeable.

Chemistry: the Central Science

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Stoichiometry: Ratios of Combination

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Chemical Bonding II: Molecular Geometry and Bonding Theories

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Intermolecular Forces and the Physical Properties of Liquids and Solids

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Acid-Base Equilibria and Solubility Equilibria

Entropy, Free Energy, and Equilibrium

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Filters

What is E°_cell for the following reaction? Al(s) + 3Ag⁺(aq) → Al³⁺(aq) + 3Ag(s)

Which electrochemical cell pictured below corresponds to the following cell diagram? Cr(s) | Cr³⁺(aq, 1.0 M) || Sn²⁺(aq, 1.0 M) | Sn(s)

Predict the products obtained from the electrolysis of a 1 M AlBr₃ solution.

When the following redox equation is balanced with the smallest whole number coefficients, the coefficient for the hydrogen sulfate ion will be ________. Al(s) + HSO₄^-(aq) + OH^-(aq) → Al₂O₃(s) + S^2-(aq) + H₂O(l)

A voltaic cell consists of a Mn/Mn²⁺ electrode (E° = -1.18 V) and a Fe/Fe²⁺ electrode (E° = -0.44 V). Calculate [Fe²⁺] if [Mn²⁺] = 0.050 M and E_cell = 0.78 V at 25°C.

When the following redox equation is balanced with the smallest whole number coefficients, what is the coefficient for nitrogen dioxide? I₂(s) + HNO₃(aq) → HIO₃(aq) + NO₂(g) + H₂O(l)

What is E°_cell for the reaction of nickel(II) ions with cadmium metal at 25°C? (R = 8.314 J/K • mol, F = 96,500 C • mol^-1)

Consider the reaction of iodine with manganese dioxide. 3I₂(s) + 2MnO₂(s) + 8OH^-(aq) 6I^-(aq) + 2MnO₄^-(aq) + 4H₂O(l) The equilibrium constant for the overall reaction is 8.3 × 10^-7. What is E°_cell for the reaction at 25°C? (R = 8.314 J/K • mol, F = 96,500 C • mol^-1)

Consider the reaction CuO(s) + H₂(g) → Cu(s) + H₂O(l) In this reaction, which substances are the oxidizing agent and reducing agent, respectively?

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

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)

Complete and balance the following redox equation. When properly balanced using the smallest whole-number coefficients, the coefficient of S is H₂S + HNO₃→ S + NO + H₂O (acidic solution)