Question 1

Write the balanced overall redox equation for the following cell diagram:
Pt(s)| Cu+(aq)| Cu2+(aq)|| Br2(l)| Br-(aq)| Pt(s)

Accepted Answer

2Cu⁺(aq)+ B...

Question 2

The electrochemical cell that utilizes the reaction Zn + Cu2+ (1 M)$\rarr$Zn2+ (1 M)+ Cu will have a lower cell emf when the concentrations of Zn2+ and Cu2+ ions are decreased to 0.1 M.

Accepted Answer

A) True 
 B)False

Question 3

When a solution of a certain gadolinium salt is electrolyzed with a current of 1.0 A for 2.0 h, 0.025 mol of Gd metal forms.Calculate the charge on the gadolinium ion in the salt.

Accepted Answer

The answer of When a solution of a certain gadolinium...

Question 4

Consider an electrochemical cell based on the spontaneous reaction 2AgCl(s) + Zn(s)  →\rarr→ 2Ag(s) + 2Cl-  + Zn2+.
If the zinc ion concentration is kept constant at 1 M, and the chlorine ion concentration is decreased from 1 M to 0.001 M, the cell voltage should

Accepted Answer

A)  increase by 0.06 V.
B)  increase by 0.18 V.
C)  decrease by 0.06 V.
D)  decrease by 0.18 V.
E)  increase by 0.35 V.

Question 5

Complete and balance the following redox equation.What is the coefficient of H2O when the equation is balanced with the set of smallest whole-number coefficients? H2O + MnO4- + I-  →\rarr→ MnO2 + IO3- (basic solution)

Accepted Answer

A)  1
B)  2
C)  4
D)  10
E)  None of these.

Question 6

Consider the following standard reduction potentials in acid solution: 3+. B) Cr. C) Mn2+. D) Co2+. E) MnO4-." class="answers-bank-image d-inline" rel="preload" > The strongest oxidizing agent listed above is

Accepted Answer

A)  Cr3+.
B)  Cr.
C)  Mn2+.
D)  Co2+.
E)  MnO4-.

Question 7

A balanced redox equation must have which of the following: I.The same number of each type of atom on both sides of the equation
II.The total number electrons lost in the oxidation equal to total number of electrons gained in the reduction
III.The same total charge of all ionic species on both sides of the reaction
IV.H2O present as a product or a reactant

Accepted Answer

A)  I, II, and III
B)  I and II
C)  I, III, and IV
D)  I, II, III, and IV
E)  III and IV

Question 8

Consider a Galvanic cell constructed from the following half cells, linked by an external circuit and by a KCl salt bridge. - an Al(s) electrode in 1.0 M Al(NO3) 3 solution
- a Pb(s) electrode in 1.0 M Pb(NO3) 2 solution
The balanced overall (net) cell reaction is

Accepted Answer

A)  Pb(s) + Al3+(aq)  →\rarr→ Pb2+(aq) + Al(s.) 
B)  3Pb(s) + 2Al3+(aq)  →\rarr→  3Pb2+(aq) + 2Al(s) .
C)  3Pb2+(aq) + 2Al(s)  →\rarr→  3Pb(s) + 2Al3+(aq) .
D)  Pb2+(aq) + Al(s)  →\rarr→  Pb(s) + Al3+(aq) .

Question 9

What concentration of Ni2+ ion remains in solution after electrolysis of 100.mL of 0.250 M NiSO4 solution when using a current of 2.40 amperes for 30.0 minutes? Assume Ni metal is plated out.

Accepted Answer

Question 10

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

Accepted Answer

A)  Na+ + e-  →\rarr→  Na.
B)  Na  →\rarr→  Na+ + e-.
C)  2H2O + 2e-  →\rarr→  H2 + 2OH-.
D)  I2 + 2e-  →\rarr→  2I-.
E)  2I-  →\rarr→ I2 + 2e-.

Question 11

Suppose the reaction Pb(s) + 2H+(aq)  →\rarr→ Pb2+(aq) + H2(g) is carried out at pH = 4.00 and at a hydrogen gas pressure of 1.00 atm.The concentration of lead(II) ions that causes this reaction to be at equilibrium is

Accepted Answer

A)  2.5 M
B)  1.6 × 10-2 M
C)  2.5 × 10-4 M
D)  1.6 × 10-6 M
E)  0.40 M

Question 12

Calculate Δ\DeltaΔ G° for the electrochemical cell Pb(s) | Pb2+(aq) || Fe3+(aq) | Fe2+(aq) | Pt(s)

Accepted Answer

A)  -1.2 x 102 kJ/mol
B)  -1.7 x 102 kJ/mol
C)  1.7 x 102 kJ/mol
D)  -8.7 x 101 kJ/mol
E)  -3.2 x 105 kJ/mol

Question 13

Calculate $\Delta$G° (kJ/mol)for the following electrochemical cell:
Cd(s)| Cd2+(aq)|| Ni2+(aq)| Ni(s)

Accepted Answer

Question 14

Calculate the minimum voltage required for the electrolysis of 1.0 M NaCl in neutral solution. 2H2O + 2Cl- (1.0 M)  →\rarr→  H2(1 atm) + Cl2(1 atm) + 2OH- (1 × 10-7 M)

Accepted Answer

A)  2.19 V
B)  1.78 V
C)  0.41 V
D)  -0.41 V
E)  -1.78 V

Question 15

Which of the following is true concerning a galvanic cell?

Accepted Answer

A)  Reduction occurs at the anode and is where anions move towards
B)  Reduction occurs at the cathode and is where anions move towards
C)  Reduction occurs at the cathode and is where cations move towards
D)  Oxidation occurs at the anode and is where cations move towards
E)  Oxidation occurs at the cathode and is where cations move towards

Question 16

Determine the equilibrium constant, Keq, at 25°C for the reaction 2Br- (aq) + I2(s)  eq, at 25°C for the reaction 2Br- (aq) + I2(s)      Br2(l) + 2I- (aq)  A) 5.7 × 10-19 B) 18.30 C) 1.7 × 1054 D) 1.9 × 1018 E) 5.7 × 10-55" class="answers-bank-image d-inline" rel="preload" >  
Br2(l) + 2I- (aq)

Accepted Answer

A)  5.7 × 10-19
B)  18.30
C)  1.7 × 1054
D)  1.9 × 1018
E)  5.7 × 10-55

Question 17

Write the formula of the strongest oxidizing agent.given the following standard reduction potentials in acid solution

Accepted Answer

The answer of Write the formula of the strongest oxidizing...

Question 18

Complete and balance the following redox equation that occurs in acidic solution using the set of smallest whole-number coefficients.What is the sum of all the coefficients in the equation? PbO2(s) + Cl-  →\rarr→  Pb2+ + Cl2(g) (acidic solution)

Accepted Answer

A)  2
B)  4
C)  5
D)  9
E)  11

Question 19

An electrochemical cell based on the following reaction has a standard cell voltage (E°cell) of 0.48 V: Sn(s) + Cu2+(aq)  →\rarr→ Sn2+(aq) + Cu(s) 
What is the standard reduction potential of tin(II) ? (E°(Cu2+/Cu) = 0.34 V)

Accepted Answer

A)  -0.14 V
B)  0.14 V
C)  -0.82 V
D)  0.82 V
E)  none of these

Question 20

If the measured voltage of the cell Zn(s) | Zn2+(aq) || Ag+(aq) | Ag(s) is 1.37 V when the concentration of Zn2+ ion is 0.010 M, what is the Ag+ ion concentration?

Accepted Answer

A)  2.5 M
B)  4.0 × 10-9 M
C)  6.2 × 10-3 M
D)  2.6 × 10-51 M
E)  6.2 × 10-5 M

Exam 18: Electrochemistry

Determine the equilibrium constant, K_eq, at 25°C for the reaction 2Br^-(aq) + I₂(s) Br₂(l) + 2I^-(aq)

Correct Answer
verified

Which of the following is true concerning a galvanic cell?

Correct Answer
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Suppose the reaction Pb(s) + 2H⁺(aq) $\rarr$ Pb²⁺(aq) + H₂(g) is carried out at pH = 4.00 and at a hydrogen gas pressure of 1.00 atm.The concentration of lead(II) ions that causes this reaction to be at equilibrium is

Correct Answer
verified

The electrochemical cell that utilizes the reaction Zn + Cu²⁺(1 M) $\rarr$ Zn²⁺(1 M)+ Cu will have a lower cell emf when the concentrations of Zn²⁺ and Cu²⁺ ions are decreased to 0.1 M.

Correct Answer
verified

Calculate $\Delta$ G° for the electrochemical cell Pb(s) | Pb²⁺(aq) || Fe³⁺(aq) | Fe²⁺(aq) | Pt(s)

Correct Answer
verified

An electrochemical cell based on the following reaction has a standard cell voltage (E°_cell) of 0.48 V: Sn(s) + Cu²⁺(aq) $\rarr$ Sn²⁺(aq) + Cu(s) What is the standard reduction potential of tin(II) ? (E°(Cu²⁺/Cu) = 0.34 V)

Correct Answer
verified

When a solution of a certain gadolinium salt is electrolyzed with a current of 1.0 A for 2.0 h, 0.025 mol of Gd metal forms.Calculate the charge on the gadolinium ion in the salt.

Correct Answer
verified

Write the formula of the strongest oxidizing agent.given the following standard reduction potentials in acid solution

Correct Answer
verified

Correct Answer
verified

Complete and balance the following redox equation that occurs in acidic solution using the set of smallest whole-number coefficients.What is the sum of all the coefficients in the equation? PbO₂(s) + Cl^- $\rarr$ Pb²⁺ + Cl₂(g) (acidic solution)

Correct Answer
verified

If the measured voltage of the cell Zn(s) | Zn²⁺(aq) || Ag⁺(aq) | Ag(s) is 1.37 V when the concentration of Zn²⁺ ion is 0.010 M, what is the Ag⁺ ion concentration?

Correct Answer
verified

Consider the following standard reduction potentials in acid solution: The strongest oxidizing agent listed above is

Correct Answer
verified

Consider a Galvanic cell constructed from the following half cells, linked by an external circuit and by a KCl salt bridge. - an Al(s) electrode in 1.0 M Al(NO₃) ₃ solution - a Pb(s) electrode in 1.0 M Pb(NO₃) ₂ solution The balanced overall (net) cell reaction is

Correct Answer
verified

Consider an electrochemical cell based on the spontaneous reaction 2AgCl(s) + Zn(s) $\rarr$ 2Ag(s) + 2Cl^- + Zn²⁺. If the zinc ion concentration is kept constant at 1 M, and the chlorine ion concentration is decreased from 1 M to 0.001 M, the cell voltage should

Correct Answer
verified

What concentration of Ni²⁺ ion remains in solution after electrolysis of 100.mL of 0.250 M NiSO₄ solution when using a current of 2.40 amperes for 30.0 minutes? Assume Ni metal is plated out.

Correct Answer
verified

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

Correct Answer
verified

Calculate $\Delta$ G° (kJ/mol)for the following electrochemical cell: Cd(s)| Cd²⁺(aq)|| Ni²⁺(aq)| Ni(s)

Correct Answer
verified

Calculate the minimum voltage required for the electrolysis of 1.0 M NaCl in neutral solution. 2H₂O + 2Cl^-(1.0 M) $\rarr$ H₂(1 atm) + Cl₂(1 atm) + 2OH^-(1 × 10^-7 M)

Correct Answer
verified

Write the balanced overall redox equation for the following cell diagram: Pt(s)| Cu⁺(aq)| Cu²⁺(aq)|| Br₂(l)| Br^-(aq)| Pt(s)

Correct Answer
verified
2Cu⁺(aq)+ B...
View Answer

Complete and balance the following redox equation.What is the coefficient of H₂O when the equation is balanced with the set of smallest whole-number coefficients? H₂O + MnO₄^- + I^- $\rarr$ MnO₂ + IO₃^- (basic solution)

Correct Answer
verified

Exam 18: Electrochemistry

Determine the equilibrium constant, Keq, at 25°C for the reaction 2Br- (aq) + I2(s) Br2(l) + 2I- (aq)

Correct AnswerverifiedShow Answer

Which of the following is true concerning a galvanic cell?

Correct AnswerverifiedShow Answer

Suppose the reaction Pb(s) + 2H+(aq) →\rarr→ Pb2+(aq) + H2(g) is carried out at pH = 4.00 and at a hydrogen gas pressure of 1.00 atm.The concentration of lead(II) ions that causes this reaction to be at equilibrium is

Correct AnswerverifiedShow Answer

The electrochemical cell that utilizes the reaction Zn + Cu2+ (1 M) →\rarr→ Zn2+ (1 M)+ Cu will have a lower cell emf when the concentrations of Zn2+ and Cu2+ ions are decreased to 0.1 M.

Correct AnswerverifiedShow Answer

Calculate Δ\DeltaΔ G° for the electrochemical cell Pb(s) | Pb2+(aq) || Fe3+(aq) | Fe2+(aq) | Pt(s)

Correct AnswerverifiedShow Answer

An electrochemical cell based on the following reaction has a standard cell voltage (E°cell) of 0.48 V: Sn(s) + Cu2+(aq) →\rarr→ Sn2+(aq) + Cu(s) What is the standard reduction potential of tin(II) ? (E°(Cu2+/Cu) = 0.34 V)

Correct AnswerverifiedShow Answer

When a solution of a certain gadolinium salt is electrolyzed with a current of 1.0 A for 2.0 h, 0.025 mol of Gd metal forms.Calculate the charge on the gadolinium ion in the salt.

Correct AnswerverifiedShow Answer

Write the formula of the strongest oxidizing agent.given the following standard reduction potentials in acid solution

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Complete and balance the following redox equation that occurs in acidic solution using the set of smallest whole-number coefficients.What is the sum of all the coefficients in the equation? PbO2(s) + Cl- →\rarr→ Pb2+ + Cl2(g) (acidic solution)

Correct AnswerverifiedShow Answer

If the measured voltage of the cell Zn(s) | Zn2+(aq) || Ag+(aq) | Ag(s) is 1.37 V when the concentration of Zn2+ ion is 0.010 M, what is the Ag+ ion concentration?

Correct AnswerverifiedShow Answer

Consider the following standard reduction potentials in acid solution: The strongest oxidizing agent listed above is

Correct AnswerverifiedShow Answer

Consider a Galvanic cell constructed from the following half cells, linked by an external circuit and by a KCl salt bridge. - an Al(s) electrode in 1.0 M Al(NO3) 3 solution - a Pb(s) electrode in 1.0 M Pb(NO3) 2 solution The balanced overall (net) cell reaction is

Correct AnswerverifiedShow Answer

Consider an electrochemical cell based on the spontaneous reaction 2AgCl(s) + Zn(s) →\rarr→ 2Ag(s) + 2Cl- + Zn2+. If the zinc ion concentration is kept constant at 1 M, and the chlorine ion concentration is decreased from 1 M to 0.001 M, the cell voltage should

Correct AnswerverifiedShow Answer

What concentration of Ni2+ ion remains in solution after electrolysis of 100.mL of 0.250 M NiSO4 solution when using a current of 2.40 amperes for 30.0 minutes? Assume Ni metal is plated out.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Calculate Δ\DeltaΔ G° (kJ/mol)for the following electrochemical cell: Cd(s)| Cd2+(aq)|| Ni2+(aq)| Ni(s)

Correct AnswerverifiedShow Answer

Calculate the minimum voltage required for the electrolysis of 1.0 M NaCl in neutral solution. 2H2O + 2Cl- (1.0 M) →\rarr→ H2(1 atm) + Cl2(1 atm) + 2OH- (1 × 10-7 M)

Correct AnswerverifiedShow Answer

Write the balanced overall redox equation for the following cell diagram: Pt(s)| Cu+(aq)| Cu2+(aq)|| Br2(l)| Br-(aq)| Pt(s)

Correct Answerverified2Cu+(aq)+ B...View AnswerShow Answer

Complete and balance the following redox equation.What is the coefficient of H2O when the equation is balanced with the set of smallest whole-number coefficients? H2O + MnO4- + I- →\rarr→ MnO2 + IO3- (basic solution)

Correct AnswerverifiedShow Answer

Determine the equilibrium constant, K_eq, at 25°C for the reaction 2Br^-(aq) + I₂(s) Br₂(l) + 2I^-(aq)

Correct Answer
verified

Correct Answer
verified

Suppose the reaction Pb(s) + 2H⁺(aq) $\rarr$ Pb²⁺(aq) + H₂(g) is carried out at pH = 4.00 and at a hydrogen gas pressure of 1.00 atm.The concentration of lead(II) ions that causes this reaction to be at equilibrium is

Correct Answer
verified

The electrochemical cell that utilizes the reaction Zn + Cu²⁺(1 M) $\rarr$ Zn²⁺(1 M)+ Cu will have a lower cell emf when the concentrations of Zn²⁺ and Cu²⁺ ions are decreased to 0.1 M.

Correct Answer
verified

Calculate $\Delta$ G° for the electrochemical cell Pb(s) | Pb²⁺(aq) || Fe³⁺(aq) | Fe²⁺(aq) | Pt(s)

Correct Answer
verified

An electrochemical cell based on the following reaction has a standard cell voltage (E°_cell) of 0.48 V: Sn(s) + Cu²⁺(aq) $\rarr$ Sn²⁺(aq) + Cu(s) What is the standard reduction potential of tin(II) ? (E°(Cu²⁺/Cu) = 0.34 V)

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Complete and balance the following redox equation that occurs in acidic solution using the set of smallest whole-number coefficients.What is the sum of all the coefficients in the equation? PbO₂(s) + Cl^- $\rarr$ Pb²⁺ + Cl₂(g) (acidic solution)

Correct Answer
verified

If the measured voltage of the cell Zn(s) | Zn²⁺(aq) || Ag⁺(aq) | Ag(s) is 1.37 V when the concentration of Zn²⁺ ion is 0.010 M, what is the Ag⁺ ion concentration?

Correct Answer
verified

Correct Answer
verified

Consider a Galvanic cell constructed from the following half cells, linked by an external circuit and by a KCl salt bridge. - an Al(s) electrode in 1.0 M Al(NO₃) ₃ solution - a Pb(s) electrode in 1.0 M Pb(NO₃) ₂ solution The balanced overall (net) cell reaction is

Correct Answer
verified

Consider an electrochemical cell based on the spontaneous reaction 2AgCl(s) + Zn(s) $\rarr$ 2Ag(s) + 2Cl^- + Zn²⁺. If the zinc ion concentration is kept constant at 1 M, and the chlorine ion concentration is decreased from 1 M to 0.001 M, the cell voltage should

Correct Answer
verified

What concentration of Ni²⁺ ion remains in solution after electrolysis of 100.mL of 0.250 M NiSO₄ solution when using a current of 2.40 amperes for 30.0 minutes? Assume Ni metal is plated out.

Correct Answer
verified

Correct Answer
verified

Calculate $\Delta$ G° (kJ/mol)for the following electrochemical cell: Cd(s)| Cd²⁺(aq)|| Ni²⁺(aq)| Ni(s)

Correct Answer
verified

Calculate the minimum voltage required for the electrolysis of 1.0 M NaCl in neutral solution. 2H₂O + 2Cl^-(1.0 M) $\rarr$ H₂(1 atm) + Cl₂(1 atm) + 2OH^-(1 × 10^-7 M)

Correct Answer
verified

Write the balanced overall redox equation for the following cell diagram: Pt(s)| Cu⁺(aq)| Cu²⁺(aq)|| Br₂(l)| Br^-(aq)| Pt(s)

Correct Answer
verified
2Cu⁺(aq)+ B...
View Answer

Complete and balance the following redox equation.What is the coefficient of H₂O when the equation is balanced with the set of smallest whole-number coefficients? H₂O + MnO₄^- + I^- $\rarr$ MnO₂ + IO₃^- (basic solution)

Correct Answer
verified