Question 1

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

Question 2

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

Accepted Answer

Question 3

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) 
A) H2(1 atm) 
B) NO3- (1 M) 
C) O2(1 atm) 
D) Br- (1 M) 
E) H+ (1 M)

Question 4

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 V 
A) 3.33 V 
B) 1.41 V 
C) -1.41 V 
D) 8.46 V 
E) -8.46 V

Question 5

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) 
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)

Question 6

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 7

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

Question 8

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-. 
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-.

Question 9

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

Question 10

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 11

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

Accepted Answer

A) ($\Delta$G cell > 0, Q cell cell  K) 
D) ($\Delta$G > 0, Ecell  0, Ecell  K) 
A) ($\Delta$G cell > 0, Q cell cell  K) 
D) ($\Delta$G > 0, Ecell  0, Ecell  K)

Question 12

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

Question 13

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 V 
A) 0.62 V 
B) 0.52 V 
C) 0.59 V 
D) 0.66 V 
E) 0.56 V

Question 14

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) 
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)

Question 15

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

Question 16

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

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) 
A) I- (1 M) 
B) Ni(s) 
C) Al3+ (1 M) 
D) F- (1 M) 
E) Ag(s)

Question 18

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 19

Which element is associated with the term "galvanized"?

Accepted Answer

A) Ga 
B) Zn 
C) Cd 
D) Hg 
E) Pb 
A) Ga 
B) Zn 
C) Cd 
D) Hg 
E) Pb

Question 20

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) NO2 
A) H2 
B) O2 
C) NO 
D) NO2

Exam 18: Electrochemistry

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

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

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

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

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?

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

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

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

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)

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?

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

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)

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

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)

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

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).

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

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

Which element is associated with the term "galvanized"?

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

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

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

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

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

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?

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

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

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

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)

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?

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)

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

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)

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

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).

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

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

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