A voltaic cell is constructed in which the anode is a Zn|Zn2+ half cell and the

Question

A voltaic cell is constructed in which the anode is a Zn|Zn2+ half cell and the cathode is a Pb|Pb2+ half cell. The half-cell compartments are connected by a salt bridge. (Use the lowest possible coefficients. Use the pull-down boxes to specify states such as (aq) or (s). If a box is not needed, leave it blank.)

The anode reaction is:

The cathode reaction is:

The net cell reaction is:

In the external circuit, electrons migrate the Zn|Zn2+ electrode the Pb|Pb2+ electrode. In the salt bridge, anions migrate the Pb|Pb2+ compartment the Zn|Zn2+ compartment.

Explanation / Answer

Anode Reaction:

Zn(s) -------- Zn(+2)(aq) + 2e-, Eo(oxidation) = 0.76V

Cathode Reaction;

Pb(+2)(aq) + 2e- ---------- Pb(s), Eo(reduction) = -0.13V

Net Cell Reaction

Pb(+2)(aq) + Zn(s) --------- Zn(+2)(aq) + Pb(s), Eo(cell) = Eo(oxidation) + Eo(reduction) = 0.76 - 0.13 = 0.63V

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