The standard cell potential (E°cell) for the reaction below is +0.63 V. The cell potential for this reaction is __________V when the concent

Question

The standard cell potential (E°cell) for the reaction below is +0.63 V. The cell potential for this reaction is __________V when the concentration of Zn2+ = 1.0 M and the

concentration of Pb2+ = 2.0 x 10-4 M.

Pb2+(aq) + Zn(s) —> Zn2+(aq) + Pb(s)

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Edana Edana 2 weeks 2021-08-30T01:41:56+00:00 1 Answers 0 views 0

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    2021-08-30T01:43:55+00:00

    Answer:

    0.52 V

    Explanation:

    From Nernst equation;

    Ecell =E°cell – 0.0592/n log Q

    E°cell = +0.63 V

    [Zn2+] =1.0 M

    [Pb2+] = 2.0 x 10-4 M

    n = 2

    Ecell = 0.63 – 0.0592/2 log[1.0/2.0 x 10-4]

    Ecell = 0.63 – 0.11

    Ecell = 0.52 V

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