Part B The half-cell is a chamber in the voltaic cell where one half-cell is the

Question

Part B

The half-cell is a chamber in the voltaic cell where one half-cell is the site of the oxidation reaction and the other half-cell is the site of the reduction reaction.

Type the half-cell reaction that takes place at the anode for the cobalt-silver voltaic cell. Indicate the physical states using the abbreviation (s), (l), or (g) for solid, liquid, or gas, respectively. Use (aq) for an aqueous solution. Do not forget to add electrons in your reaction.

Express your answer as a chemical equation.

Part C

The half-cell is a chamber in the voltaic cell where one half-cell is the site of an oxidation reaction and the other half-cell is the site of a reduction reaction.

Type the half-cell reaction that takes place at the cathode for the cobalt-silver voltaic cell. Indicate physical states using the abbreviation (s), (l), or (g) for solid, liquid, or gas, respectively. Use (aq) for an aqueous solution. Do not forget to add electrons in your reaction.

Express your answer as a chemical equation.

Explanation / Answer

Part-B:

In a voltaic cell, oxidation takes place at anode.

Co(s) has higher oxidation potential. Hence it undergoes oxidation at anode to form Co3+(aq). Hence half - cell reaction is

Co(s) -------- > Co3+(aq) + 3e- (answer)

Part - C:

In a voltaic cell, reduction takes place at cathode.

Ag+(aq) has higher reduction potential. Hence it underges reduction to form Ag(s). Hence the half - cell reaction at cathode is

3Ag+(aq) + 3e-  -------- > 3Ag(s)

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