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Exam 17: Electrochemistry

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Question 51

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Ag⁺(aq) + e^- → Ag(s) E° = +0.800 V AgBr(s) + e^- → Ag(s) + Br^-(aq) E° = +0.071 V Br₂(l) + 2 e^- → 2 Br^-(aq) E° = +1.066 V Use some of the data above to calculate K_sp at 25°C for AgBr.

A) 6.3 × 10^-2
B) 4.9 × 10^-13
C) 1.9 × 10^-15
D) (^2.4 × 10^-34)

E) A) and C)
F) C) and D)

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Question 52

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What is the reduction half-reaction for the following overall cell reaction? Co²⁺(aq) + 2 Ag(s) → Co(s) + 2 Ag⁺(aq)

A) Ag(s) + e^- → Ag⁺(aq)
B) Ag⁺(aq) + e^- → Ag(s)
C) Co²⁺(aq) + 2 e^- → Co(s)
D) Co²⁺(aq) + e^- → Co(s)

E) A) and B)
F) A) and C)

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Question 53

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A galvanic cell consists of a La³⁺/La half-cell and a standard hydrogen electrode.If the La³⁺/La half-cell standard cell functions as the anode,and the standard cell potential is 2.52 V,what is the standard reduction potential for the La³⁺/La half-cell?

In the galvanic cell represented by the shorthand notation shown below Pb(aq)| Pb²⁺(aq)| Cl₂(g)|Cl^-(aq)| Pt(s) the inert electrode is ________,and the balanced cathode half-reaction reaction is ________.

During an electrochemical reaction,electrons move through the external circuit toward the ________ and positive ions in the cell move toward the ________.

The standard cell potential for the following galvanic cell is 0.71 V. Mg(s)|Mg²⁺(aq)||Al³⁺(aq)|Al This reaction has an equilibrium constant,K = ________.

-According to Table 17.1,which will reduce water but not Mg²⁺?

Calculate the cell potential E at 25°C for the reaction 2 Al(s) + 3 Fe²⁺(aq) → 2 Al³⁺(aq) + 3 Fe(s) Given that [Fe²⁺] = 0.020 M,[Al³⁺] = 0.10 M,and the standard reduction potential is -1.66 V for Al³⁺/Al and -0.45 V for Fe²⁺/Fe.

A galvanic cell consists of a Ni²⁺/ Ni half-cell and a standard hydrogen electrode.If the Ni²⁺/ Ni half-cell standard cell functions as the anode,and the standard cell potential is 0.26 V,what is the standard reduction potential for the Ni²+/ Ni half-cell?

Consider the following table of standard half-cell potentials: A₂ + 2 e^- → 2 A^- E° = + 1.09 V B⁴⁺ + 2 e^- → B²⁺ E° = + 0.15 V C³⁺ + 3 e^- → C E° = - 1.66 V D²⁺ + 2 e^- → D E° = - 2.37 V Which substance is the strongest oxidizing agent?

For the galvanic cell reaction,expressed below using shorthand notation,what half-reaction occurs at the cathode? Zn(s) ∣ Zn²⁺(aq) ∣∣ Ni²⁺(aq) ∣ Ni(s)

Shown below is a galvanic cell with anode compartment b containing anode a and cathode compartment d containing cathode c.Electrons flow through wire f,ions flow through salt bridge e,and the cell potential is read using voltmeter g. This galvanic cell uses the reaction: Cu(s) + 2 Ag⁺(aq) $\rarr$ 2 Ag(s) + Cu²⁺(aq) . -Given the half-cell potentials below,calculate the cell potential. Ag⁺(aq) + e^- → Ag(s) 0.80 V Cu²⁺(aq) + 2 e^- → Cu(s) 0.34 V

What is the shorthand notation that represents the following galvanic cell reaction? 2 Fe²⁺(aq) + F₂(g) → 2 Fe³⁺(aq) + 2 F^-(aq)

Shown below is a galvanic cell with anode compartment b containing anode a and cathode compartment d containing cathode c.Electrons flow through wire f,ions flow through salt bridge e,and the cell potential is read using voltmeter g. This galvanic cell uses the reaction: Cu(s) + 2 Ag⁺(aq) $\rarr$ 2 Ag(s) + Cu²⁺(aq) . -What is the shorthand notation for this cell?

For the galvanic cell reaction,expressed below using shorthand notation,what half-reaction occurs at the cathode? Zn(s) ∣ Zn²⁺(aq) ∣∣ Ni²⁺(aq) ∣ Ni(s)

Which battery does not use MnO₂(s) as a cell reactant?

Which cell involves a nonspontaneous redox reaction?

The shorthand notation for the galvanic cell reaction Fe³⁺(aq) + 2 I^-(aq) → Fe²⁺(aq) + I₂(s) requires an inert electrode on

The gas OF₂ can be produced from the electrolysis of an aqueous solution of KF,as shown in the equation below. OF₂(g) + 2 H⁺(aq) + 4 e^- → H₂O(l) + 2 F^-(aq) E° = +2.15 V Using the given standard reduction potential,calculate the amount of OF₂ that is produced,and the electrode at which the OF₂ is produced,upon the passage of 0.480 faradays through an aqueous KF solution.

What is the standard cell potential for the reaction below? Mg(s) + Br₂(l) → Mg²⁺(aq) + 2 Br^-(aq) The standard reduction potential is -2.37 V for the Mg²⁺/Mg half-cell and +1.09 V for the Br₂/Br^- half-cell.