Question 1

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

Accepted Answer

A)  copper.
B)  lead.
C)  zinc.
D)  silver.
E)  tin.F) C) and D)
G) B) and E)

Question 2

When aqueous brine is electrolyzed, the products are:

Accepted Answer

A)  chlorine gas, hydrogen gas, and sodium hydroxide solution
B)  chlorine gas and sodium metal
C)  Na2O and HCl
D)  NaCl and sodium metal
E)  NaClO3 and NaClO2F) None of the above
G) B) and C)

Question 3

A galvanic cell consists of a Cu(s) |Cu2+(aq) half-cell and a Cd(s) |Cd2+(aq) half-cell connected by a salt bridge. Oxidation occurs in the cadmium half-cell. The cell can be represented in standard notation as:

Accepted Answer

A)  Cu(s) |Cu2+(aq) |Cd(s) |Cd2+(aq) 
B)  Cd(s) |Cd2+(aq) ||Cu2+(aq) |Cu(s) 
C)  Cd2+(aq) |Cd(s) ||Cu(s) |Cu2+(aq) 
D)  Cd(s) |Cd2+(aq) ||Cu(s) |Cu2+(aq) 
E)  Cu2+(aq) |Cu(s) ||Cd(s) |Cd2+(aq) F) A) and B)
G) D) and E)

Question 4

The equation for the chemical reaction from which the expression for the solubility product of NtSO4(s)is derived is: NtSO4(s) Nt2+(aq)+ SO42-(aq). Use this equation and the reduction potentials below to help you determine the solubility product of NtSO4 (s). (Note that the imaginary element Nt is being used).

Accepted Answer

Question 5

A galvanic cell consists of an Ag(s) |Ag+(aq) half-cell and a Cu(s) |Cu2+(aq) half-cell connected by a salt bridge. The cell can be represented in standard notation as: Cu(s) |Cu2+(aq) ||Ag+(aq) |Ag(s) .Which species is being reduced?

Accepted Answer

A)  Ag+(aq) 
B)  Cu2+(aq) 
C)  Ag(s) 
D)  Cu(s) 
E)  Cu+(aq) F) B) and D)
G) C) and D)

Question 6

The equilibrium constant, Kc, was found to be 1.2 × 103 at 25°C for the reaction,2X(s) + Cu2+(aq)  c, was found to be 1.2 × 103 at 25°C for the reaction,2X(s) + Cu2+(aq)    2X+(aq) + Cu(s) Using the following reduction potential for copper, what is the reduction potential for the other half reaction involving the substance X?   A) -0.16 V B) 0.091 V C) 0.52 V D) 0.18 V E) -0.25 V" class="answers-bank-image d-inline" rel="preload" > 2X+(aq) + Cu(s) Using the following reduction potential for copper, what is the reduction potential for the other half reaction involving the substance X? c, was found to be 1.2 × 103 at 25°C for the reaction,2X(s) + Cu2+(aq)    2X+(aq) + Cu(s) Using the following reduction potential for copper, what is the reduction potential for the other half reaction involving the substance X?   A) -0.16 V B) 0.091 V C) 0.52 V D) 0.18 V E) -0.25 V" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  -0.16 V
B)  0.091 V
C)  0.52 V
D)  0.18 V
E)  -0.25 VF) A) and E)
G) A) and D)

Question 7

When an electrical current is passed through fused (molten)magnesium chloride, chlorine gas is produced at the negatively charged electrode.

Accepted Answer

A) True 
 B)False

Question 8

The Faraday constant is equal to the ________ on 1 mole of electrons.

Accepted Answer

electrical...

Question 9

Consider the following reaction: 2Cu+(aq)+ Ni2+ → 2Cu2+(aq)+ Ni(s). When the reaction comes to equilibrium, what is the cell voltage?

Accepted Answer

Question 10

Consider these metal ion/metal standard reduction potentials 2+(aq)  B) Zn2+(aq)  C) Co2+(aq)  D) Cu2+(aq)  E) Ni2+(aq) " class="answers-bank-image d-inline" rel="preload" > Based on the data above, which species is the best oxidizing agent?

Accepted Answer

A)  Cd2+(aq) 
B)  Zn2+(aq) 
C)  Co2+(aq) 
D)  Cu2+(aq) 
E)  Ni2+(aq) F) A) and B)
G) C) and D)

Question 11

A galvanic cell has two electrodes. Which statement is correct?

Accepted Answer

A)  Oxidation takes place at the anode, which is positively charged.
B)  Oxidation takes place at the anode, which is negatively charged.
C)  Oxidation takes place at the cathode, which is positively charged.
D)  Oxidation takes place at the cathode, which is negatively charged.
E)  Oxidation take place at the dynode, which is uncharged.F) A) and E)
G) B) and E)

Question 12

When fused (molten) sodium chloride is electrolyzed what occurs?

Accepted Answer

A)  Gaseous chlorine is formed at the cathode.
B)  Hydrogen gas is formed at the cathode.
C)  Liquid sodium is formed at the cathode.
D)  Liquid chlorine is formed at the anode.
E)  Solid sodium is formed at the anode.F) A) and E)
G) A) and B)

Question 13

Consider these metal ion/metal standard reduction potentials  Based on the data above, which species is the best reducing agent?

Accepted Answer

A)  Cd(s) 
B)  Ag(s) 
C)  Ni(s) 
D)  Zn(s) 
E)  Cu(s) F) C) and E)
G) B) and D)

Question 14

Using these metal ion/metal standard reduction potentials 2+(aq) + Cr(s)  \rarr Fe(s) + Cr3+(aq)  A) -0.30 V B) -1.18 V C) +0.30 V D) +0.16 V E) -0.16 V " class="answers-bank-image d-inline" rel="preload" >
 Calculate the standard cell potential for the cell whose reaction is:
Fe2+(aq) + Cr(s)  →\rarr→ Fe(s) + Cr3+(aq)

Accepted Answer

A)  -0.30 V
B)  -1.18 V
C)  +0.30 V
D)  +0.16 V
E)  -0.16 V F) B) and C)
G) None of the above

Question 15

The Downs cell is used in the electrolytic manufacture of

Accepted Answer

A)  chlorine gas and sodium hydroxide.
B)  hydrogen gas and chlorine gas.
C)  hydrogen gas and sodium hydroxide.
D)  sodium metal and chlorine gas.
E)  sodium metal and sodium hydroxide.F) D) and E)
G) C) and D)

Question 16

How many minutes would be required to electroplate 25.0 grams of chromium by passing a constant current of 4.80 amperes through a solution containing CrCl3?
(Cr: 52.00 g/mol, Cl: 35.453 g/mol)

Accepted Answer

A)  161 minutes
B)  322 minutes
C)  4.80 × 102 minutes
D)  1.11 × 104 minutes
E)  2.01 × 104 minutesF) None of the above
G) A) and C)

Question 17

A galvanic cell consists of an Ag(s) |Ag+(aq) half-cell and a Cu(s) |Cu2+(aq) half-cell connected by a salt bridge. The cell can be represented in standard notation as:

Accepted Answer

A)  Ag(s) |Ag+(aq) |Cu(s) |Cu2+(aq) 
B)  Cu(s) |Cu2+(aq) ||Ag(s) |Ag+(aq) 
C)  Ag+(aq) |Ag(s) ||Cu(s) |Cu2+(aq) 
D)  Cu2+(aq) |Cu(s) ||Ag(s) |Ag+(aq) 
E)  Cu(s) |Cu2+(aq) ||Ag+(aq) |Ag(s) F) D) and E)
G) B) and C)

Question 18

Which one of the following, when added to a piece of Cu(s) in solution, is capable of oxidizing Cu(s) to Cu2+(aq) ?

Accepted Answer

A)  I- (aq) 
B)  Ni2+ (s) 
C)  Ag+ (aq) 
D)  Al3+ (aq) 
E)  H2 (g) F) A) and B)
G) A) and C)

Question 19

Using these metal ion/metal standard reduction potentials 2+(aq) + Cd(s)  \rarr Cd2+(aq) + Cu(s)  A) +0.76 V B) +0.06 V C) -0.06 V D) +0.74 V E) +0.20 V " class="answers-bank-image d-inline" rel="preload" > Calculate the standard cell potential for the cell whose reaction is:
Cu2+(aq) + Cd(s)  →\rarr→ Cd2+(aq) + Cu(s)

Accepted Answer

A)  +0.76 V
B)  +0.06 V
C)  -0.06 V
D)  +0.74 V
E)  +0.20 V F) B) and E)
G) B) and C)

Question 20

A galvanic cell is composed of these two half-cells, with the standard reduction potentials shown: 2+(aq) ] = 0.00100 M, [Cd2+] = 0.100 M. What is the potential of this galvanic cell? Hint: First calculate E°, then apply the solution concentrations of the galvanic cell using the Nernst equation. A) +0.18 V B) +0.12 V C) +0.24 V D) +0.060 V E) +0.68 V" class="answers-bank-image d-inline" rel="preload" > The actual concentrations are: [Co2+(aq) ] = 0.00100 M, [Cd2+] = 0.100 M. What is the potential of this galvanic cell? Hint: First calculate E°, then apply the solution concentrations of the galvanic cell using the Nernst equation.

Accepted Answer

A)  +0.18 V
B)  +0.12 V
C)  +0.24 V
D)  +0.060 V
E)  +0.68 VF) B) and E)
G) B) and C)

Exam 20: Electrochemistry

Correct Answer
verified

When fused (molten) sodium chloride is electrolyzed what occurs?

Correct Answer
verified

Consider these metal ion/metal standard reduction potentials Based on the data above, which species is the best reducing agent?

Correct Answer
verified

Which one of the following, when added to a piece of Cu(s) in solution, is capable of oxidizing Cu(s) to Cu²⁺(aq) ?

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

Correct Answer
verified

The equilibrium constant, K_c, was found to be 1.2 × 10³ at 25°C for the reaction,2X(s) + Cu²⁺(aq) 2X⁺(aq) + Cu(s) Using the following reduction potential for copper, what is the reduction potential for the other half reaction involving the substance X?

Correct Answer
verified

Consider these metal ion/metal standard reduction potentials Based on the data above, which species is the best oxidizing agent?

Correct Answer
verified

When an electrical current is passed through fused (molten)magnesium chloride, chlorine gas is produced at the negatively charged electrode.

Correct Answer
verified

The Faraday constant is equal to the ________ on 1 mole of electrons.

Correct Answer
verified
electrical...
View Answer

Consider the following reaction: 2Cu⁺(aq)+ Ni²⁺ → 2Cu²⁺(aq)+ Ni(s). When the reaction comes to equilibrium, what is the cell voltage?

Correct Answer
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When aqueous brine is electrolyzed, the products are:

Correct Answer
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A galvanic cell has two electrodes. Which statement is correct?

Correct Answer
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A galvanic cell consists of an Ag(s) |Ag⁺(aq) half-cell and a Cu(s) |Cu²⁺(aq) half-cell connected by a salt bridge. The cell can be represented in standard notation as: Cu(s) |Cu²⁺(aq) ||Ag⁺(aq) |Ag(s) .Which species is being reduced?

Correct Answer
verified

Correct Answer
verified

A galvanic cell consists of an Ag(s) |Ag⁺(aq) half-cell and a Cu(s) |Cu²⁺(aq) half-cell connected by a salt bridge. The cell can be represented in standard notation as:

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The Downs cell is used in the electrolytic manufacture of

Correct Answer
verified

How many minutes would be required to electroplate 25.0 grams of chromium by passing a constant current of 4.80 amperes through a solution containing CrCl₃? (Cr: 52.00 g/mol, Cl: 35.453 g/mol)

Correct Answer
verified

A galvanic cell consists of a Cu(s) |Cu²⁺(aq) half-cell and a Cd(s) |Cd²⁺(aq) half-cell connected by a salt bridge. Oxidation occurs in the cadmium half-cell. The cell can be represented in standard notation as:

Correct Answer
verified

Exam 20: Electrochemistry

Correct AnswerverifiedShow Answer

When fused (molten) sodium chloride is electrolyzed what occurs?

Correct AnswerverifiedShow Answer

Consider these metal ion/metal standard reduction potentials Based on the data above, which species is the best reducing agent?

Correct AnswerverifiedShow Answer

Which one of the following, when added to a piece of Cu(s) in solution, is capable of oxidizing Cu(s) to Cu2+(aq) ?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The equilibrium constant, Kc, was found to be 1.2 × 103 at 25°C for the reaction,2X(s) + Cu2+(aq) 2X+(aq) + Cu(s) Using the following reduction potential for copper, what is the reduction potential for the other half reaction involving the substance X?

Correct AnswerverifiedShow Answer

Consider these metal ion/metal standard reduction potentials Based on the data above, which species is the best oxidizing agent?

Correct AnswerverifiedShow Answer

When an electrical current is passed through fused (molten)magnesium chloride, chlorine gas is produced at the negatively charged electrode.

Correct AnswerverifiedShow Answer

The Faraday constant is equal to the ________ on 1 mole of electrons.

Correct Answerverifiedelectrical...View AnswerShow Answer

Consider the following reaction: 2Cu+(aq)+ Ni2+ → 2Cu2+(aq)+ Ni(s). When the reaction comes to equilibrium, what is the cell voltage?

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When aqueous brine is electrolyzed, the products are:

Correct AnswerverifiedShow Answer

A galvanic cell has two electrodes. Which statement is correct?

Correct AnswerverifiedShow Answer

A galvanic cell consists of an Ag(s) |Ag+(aq) half-cell and a Cu(s) |Cu2+(aq) half-cell connected by a salt bridge. The cell can be represented in standard notation as: Cu(s) |Cu2+(aq) ||Ag+(aq) |Ag(s) .Which species is being reduced?

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Using these metal ion/metal standard reduction potentials Calculate the standard cell potential for the cell whose reaction is: Cu2+(aq) + Cd(s) →\rarr→ Cd2+(aq) + Cu(s)

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A galvanic cell consists of an Ag(s) |Ag+(aq) half-cell and a Cu(s) |Cu2+(aq) half-cell connected by a salt bridge. The cell can be represented in standard notation as:

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Using these metal ion/metal standard reduction potentials Calculate the standard cell potential for the cell whose reaction is: Fe2+(aq) + Cr(s) →\rarr→ Fe(s) + Cr3+(aq)

Correct AnswerverifiedShow Answer

The Downs cell is used in the electrolytic manufacture of

Correct AnswerverifiedShow Answer

How many minutes would be required to electroplate 25.0 grams of chromium by passing a constant current of 4.80 amperes through a solution containing CrCl3? (Cr: 52.00 g/mol, Cl: 35.453 g/mol)

Correct AnswerverifiedShow Answer

A galvanic cell consists of a Cu(s) |Cu2+(aq) half-cell and a Cd(s) |Cd2+(aq) half-cell connected by a salt bridge. Oxidation occurs in the cadmium half-cell. The cell can be represented in standard notation as:

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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Which one of the following, when added to a piece of Cu(s) in solution, is capable of oxidizing Cu(s) to Cu²⁺(aq) ?

Correct Answer
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Correct Answer
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The equilibrium constant, K_c, was found to be 1.2 × 10³ at 25°C for the reaction,2X(s) + Cu²⁺(aq) 2X⁺(aq) + Cu(s) Using the following reduction potential for copper, what is the reduction potential for the other half reaction involving the substance X?

Correct Answer
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Correct Answer
verified

Correct Answer
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Correct Answer
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electrical...
View Answer

Consider the following reaction: 2Cu⁺(aq)+ Ni²⁺ → 2Cu²⁺(aq)+ Ni(s). When the reaction comes to equilibrium, what is the cell voltage?

Correct Answer
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Correct Answer
verified

Correct Answer
verified

A galvanic cell consists of an Ag(s) |Ag⁺(aq) half-cell and a Cu(s) |Cu²⁺(aq) half-cell connected by a salt bridge. The cell can be represented in standard notation as: Cu(s) |Cu²⁺(aq) ||Ag⁺(aq) |Ag(s) .Which species is being reduced?

Correct Answer
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Correct Answer
verified

A galvanic cell consists of an Ag(s) |Ag⁺(aq) half-cell and a Cu(s) |Cu²⁺(aq) half-cell connected by a salt bridge. The cell can be represented in standard notation as:

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified

How many minutes would be required to electroplate 25.0 grams of chromium by passing a constant current of 4.80 amperes through a solution containing CrCl₃? (Cr: 52.00 g/mol, Cl: 35.453 g/mol)

Correct Answer
verified

A galvanic cell consists of a Cu(s) |Cu²⁺(aq) half-cell and a Cd(s) |Cd²⁺(aq) half-cell connected by a salt bridge. Oxidation occurs in the cadmium half-cell. The cell can be represented in standard notation as:

Correct Answer
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