Question 1

For the reaction, 2Cr2+ + Cl2(g)  →\rarr→ 2Cr3+ + 2Cl-, E°cell is 1.78 V.Calculate E°cell for the related reaction Cr3+ + Cl-  →\rarr→  Cr2+ + 1/2Cl2(g) .

Accepted Answer

A)  1.78 V
B)  0.89 V
C)  -1.78 V
D)  -0.89 V
E)  None of these. F) A) and D)
G) A) and C)

Question 2

Will H2(g)form when Cu is placed in 1.0 M HCl?

Accepted Answer

Question 3

Find the emf of the cell described by the cell diagram Fe | Fe2+ (1.500M) || Au3+ (0.00400M) | Au

Accepted Answer

A)  1.99 V
B)  1.89 V
C)  1.94 V
D)  1.66 V
E)  1.91 VF) A) and E)
G) A) and C)

Question 4

Which one of the following is consistent with a galvanic cell?

Accepted Answer

A)  ( Δ\DeltaΔ G cell > 0, Q 
B)  ( Δ\DeltaΔ G cell 
C)  ( Δ\DeltaΔ G cell  K) 
D)  ( Δ\DeltaΔ G > 0, Ecell 
E)  ( Δ\DeltaΔ G > 0, Ecell  K)  F) B) and D)
G) A) and D)

Question 5

Which one of the following reagents is capable of reducing Fe3+ (1 M) to Fe2+ (1 M) ?

Accepted Answer

A)  H2(1 atm) 
B)  NO3- (1 M) 
C)  O2(1 atm) 
D)  Br- (1 M) 
E)  H+ (1 M) F) All of the above
G) B) and D)

Question 6

Complete and balance the following redox equation.The sum of the smallest whole-number coefficients is Br2  →\rarr→ BrO3- + Br- (basic solution)

Accepted Answer

A)  9
B)  12
C)  18
D)  21
E)  None of the above. F) A) and B)
G) A) and C)

Question 7

Which one of the following reagents is capable of oxidizing Br- (aq) to Br2(l) under standard-state conditions?

Accepted Answer

A)  I- (aq) 
B)  NO3- (aq) 
C)  Ag+ (aq) 
D)  Al3+ (aq) 
E)  Au3+ (aq) F) B) and E)
G) D) and E)

Question 8

Complete and balance the following redox equation using the set of smallest whole-numbers coefficients.What is the sum of the coefficients?
 HI + HNO3  →\rarr→ I2 + NO (acidic solution)

Accepted Answer

A)  5
B)  7
C)  14
D)  17
E)  None of these. F) B) and E)
G) A) and B)

Question 9

Complete and balance the following redox reaction under acidic conditions:
Cu(s)+ NO3-(aq)$\rarr$ Cu2+(aq)+ NO2(g)

Accepted Answer

Cu(s)+ 2NO...

Question 10

Which element is associated with the term "galvanized"?

Accepted Answer

A)  Ga
B)  Zn
C)  Cd
D)  Hg
E)  PbF) B) and C)
G) A) and E)

Question 11

A standard hydrogen electrode is immersed in an acetic acid solution.This electrode is connected by an external circuit to an iron nail dipping into 0.10 M FeCl2.If Ecell is found to be 0.24 V, what is the pH of the acetic acid solution?

Accepted Answer

Question 12

When an aqueous solution of AgNO3 is electrolyzed, a gas is observed to form at the anode.The gas is

Accepted Answer

A)  H2
B)  O2
C)  NO
D)  NO2E) A) and C)
F) A) and D)

Question 13

The half-reaction that occurs at the cathode during electrolysis of an aqueous CuCl2 solution is

Accepted Answer

A)  Cu+ + e-  →\rarr→  Cu.
B)  Cu2+ + e-  →\rarr→  Cu+.
C)  2H2O + 2e-  →\rarr→  H2 + 2OH-.
D)  Cl2 + 2e-  →\rarr→  2Cl-.
E)  2Cl-  →\rarr→ Cl2 + 2e-. F) B) and D)
G) A) and B)

Question 14

Complete and balance the following redox equation.The sum of the smallest whole-number coefficients is Bi(OH) 3 + SnO22-  →\rarr→  Bi + SnO32- (basic solution)

Accepted Answer

A)  32
B)  25
C)  16
D)  13
E)  None of these. F) C) and D)
G) A) and B)

Question 15

Determine the cell diagram for the reaction below.Assume platinum electrodes are used when no other solid is present. Cl2(g) + Sn2+(aq)  →\rarr→ Sn4+(aq) + 2Cl-(aq)

Accepted Answer

A)  Pt(s) | Cl2(g) | Cl-(aq) || Sn2+(aq) , Sn4+(aq) | Pt(s) 
B)  Pt(s) | Sn2+(aq) , Sn4+(aq) || Cl2(g) | Cl-(aq) | Pt(s) 
C)  Pt(s) | Sn4+(aq) , Sn2+(aq) || Cl-(aq) | Cl2(g) | Pt(s) 
D)  Pt(s) | Cl-(g) | Cl2(aq) || Sn4+(aq) , Sn2+(aq) | Pt(s) 
E)  Pt(s) | Cl2(g) | Sn2+(aq) || Sn4+(aq) , Cl-(aq) | Pt(s)  F) None of the above
G) A) and E)

Question 16

Given the following notation for an electrochemical cell Pt(s) | H2(g) | H+(aq) || Ag+(aq) | Ag(s) 
What is the balanced overall (net) cell reaction?

Accepted Answer

A)  2H+(aq) + 2Ag+(aq)  →\rarr→ H2(g) + 2Ag(s) 
B)  H2(g) + 2Ag(s)  →\rarr→ H+(aq) + 2Ag+(aq) 
C)  2H+(aq) + 2Ag(s)  →\rarr→  H2(g) + 2Ag+(aq) 
D)  H2(g) + Ag+(aq)  →\rarr→  H+(aq) + Ag(s) 
E)  H2(g) + 2Ag+(aq)  →\rarr→  2H+(aq) + 2Ag(s)  F) A) and B)
G) A) and C)

Question 17

Which one of the following reagents is capable of reducing Cu2+(1 M) to Cu(s) ?

Accepted Answer

A)  I- (1 M) 
B)  Ni(s) 
C)  Al3+ (1 M) 
D)  F- (1 M) 
E)  Ag(s) F) C) and D)
G) All of the above

Question 18

Find the emf of the cell described by the cell diagram Ni | Ni2+ (0.750 M) || Cu2+ (0.0500 M) | Cu

Accepted Answer

A)  0.62 V
B)  0.52 V
C)  0.59 V
D)  0.66 V
E)  0.56 VF) All of the above
G) B) and D)

Question 19

What current is needed to deposit 0.500 g of chromium metal from a solution of Cr3+ in a period of 1.00 hr?

Accepted Answer

Question 20

Calculate the standard cell emf for the following cell: Mg | Mg2+ || NO3- (acid soln) | NO(g) | Pt

Accepted Answer

A)  3.33 V
B)  1.41 V
C)  -1.41 V
D)  8.46 V
E)  -8.46 VF) C) and D)
G) A) and B)

Exam 18: Electrochemistry

Find the emf of the cell described by the cell diagram Fe | Fe2+ (1.500M) || Au3+ (0.00400M) | Au

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Complete and balance the following redox equation.The sum of the smallest whole-number coefficients is Br2 →\rarr→ BrO3- + Br- (basic solution)

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Calculate the standard cell emf for the following cell: Mg | Mg2+ || NO3- (acid soln) | NO(g) | Pt

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Which one of the following reagents is capable of reducing Fe3+ (1 M) to Fe2+ (1 M) ?

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The half-reaction that occurs at the cathode during electrolysis of an aqueous CuCl2 solution is

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A standard hydrogen electrode is immersed in an acetic acid solution.This electrode is connected by an external circuit to an iron nail dipping into 0.10 M FeCl2.If Ecell is found to be 0.24 V, what is the pH of the acetic acid solution?

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Will H2(g)form when Cu is placed in 1.0 M HCl?

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Which one of the following reagents is capable of reducing Cu2+(1 M) to Cu(s) ?

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Determine the cell diagram for the reaction below.Assume platinum electrodes are used when no other solid is present. Cl2(g) + Sn2+(aq) →\rarr→ Sn4+(aq) + 2Cl-(aq)

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Complete and balance the following redox reaction under acidic conditions: Cu(s)+ NO3-(aq) →\rarr→ Cu2+(aq)+ NO2(g)

Correct AnswerverifiedCu(s)+ 2NO...View AnswerShow Answer

Find the emf of the cell described by the cell diagram Ni | Ni2+ (0.750 M) || Cu2+ (0.0500 M) | Cu

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Complete and balance the following redox equation.The sum of the smallest whole-number coefficients is Bi(OH) 3 + SnO22- →\rarr→ Bi + SnO32- (basic solution)

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Which one of the following reagents is capable of oxidizing Br- (aq) to Br2(l) under standard-state conditions?

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When an aqueous solution of AgNO3 is electrolyzed, a gas is observed to form at the anode.The gas is

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What current is needed to deposit 0.500 g of chromium metal from a solution of Cr3+ in a period of 1.00 hr?

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Complete and balance the following redox equation using the set of smallest whole-numbers coefficients.What is the sum of the coefficients? HI + HNO3 →\rarr→ I2 + NO (acidic solution)

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Which element is associated with the term "galvanized"?

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Given the following notation for an electrochemical cell Pt(s) | H2(g) | H+(aq) || Ag+(aq) | Ag(s) What is the balanced overall (net) cell reaction?

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For the reaction, 2Cr2+ + Cl2(g) →\rarr→ 2Cr3+ + 2Cl-, E°cell is 1.78 V.Calculate E°cell for the related reaction Cr3+ + Cl- →\rarr→ Cr2+ + 1/2Cl2(g) .

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Which one of the following is consistent with a galvanic cell?

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Find the emf of the cell described by the cell diagram Fe | Fe²⁺ (1.500M) || Au³⁺ (0.00400M) | Au

Correct Answer
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Complete and balance the following redox equation.The sum of the smallest whole-number coefficients is Br₂ $\rarr$ BrO₃^- + Br^- (basic solution)

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Calculate the standard cell emf for the following cell: Mg | Mg²⁺ || NO₃^-(acid soln) | NO(g) | Pt

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Which one of the following reagents is capable of reducing Fe³⁺(1 M) to Fe²⁺(1 M) ?

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The half-reaction that occurs at the cathode during electrolysis of an aqueous CuCl₂ solution is

Correct Answer
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A standard hydrogen electrode is immersed in an acetic acid solution.This electrode is connected by an external circuit to an iron nail dipping into 0.10 M FeCl₂.If E_cell is found to be 0.24 V, what is the pH of the acetic acid solution?

Correct Answer
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Will H₂(g)form when Cu is placed in 1.0 M HCl?

Correct Answer
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Which one of the following reagents is capable of reducing Cu²⁺(1 M) to Cu(s) ?

Correct Answer
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Determine the cell diagram for the reaction below.Assume platinum electrodes are used when no other solid is present. Cl₂(g) + Sn²⁺(aq) $\rarr$ Sn⁴⁺(aq) + 2Cl^-(aq)

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Complete and balance the following redox reaction under acidic conditions: Cu(s)+ NO₃^-(aq) $\rarr$ Cu²⁺(aq)+ NO₂(g)

Correct Answer
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Cu(s)+ 2NO...
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Find the emf of the cell described by the cell diagram Ni | Ni²⁺ (0.750 M) || Cu²⁺ (0.0500 M) | Cu

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Complete and balance the following redox equation.The sum of the smallest whole-number coefficients is Bi(OH) ₃ + SnO₂^2- $\rarr$ Bi + SnO₃^2- (basic solution)

Correct Answer
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Which one of the following reagents is capable of oxidizing Br^-(aq) to Br₂(l) under standard-state conditions?

Correct Answer
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When an aqueous solution of AgNO₃ is electrolyzed, a gas is observed to form at the anode.The gas is

Correct Answer
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What current is needed to deposit 0.500 g of chromium metal from a solution of Cr³⁺ in a period of 1.00 hr?

Correct Answer
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Complete and balance the following redox equation using the set of smallest whole-numbers coefficients.What is the sum of the coefficients? HI + HNO₃ $\rarr$ I₂ + NO (acidic solution)

Correct Answer
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Correct Answer
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Given the following notation for an electrochemical cell Pt(s) | H₂(g) | H⁺(aq) || Ag⁺(aq) | Ag(s) What is the balanced overall (net) cell reaction?

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For the reaction, 2Cr²⁺ + Cl₂(g) $\rarr$ 2Cr³⁺ + 2Cl^-, E°_cell is 1.78 V.Calculate E°_cell for the related reaction Cr³⁺ + Cl^- $\rarr$ Cr²⁺ + ¹/₂Cl₂(g) .

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Correct Answer
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