ElectrochemistryHard

Question

During the electrolysis of 0.1 M CuSO4 solution using copper electrodes, a depletion of [Cu++] occurs near the cathode with a corresponding excess near the anode, owing to inefficient stirring of the solution. If the local concentrations of [Cu++] near the anode & cathode are respectively 0.12 M & 0.08 M, calculate the back e.m.f. developed. Temperature = 298 K .

Options

A.22 mV
B.5.2 mV
C.29 mV
D.59 mV

Solution

Ecell = Eocell - log10
Eocell = 0
Ecell = - log10 = + 5.2 mV.

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