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Electrochemistry

Question
CBSEENCH12010943
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The standard e.m.f of a cell, involving one electron change is found to be 0.591 V at 25°C. The equilibrium constant of the reaction is (F = 96,500 C mol-1: R = 8.314 JK-1 mol-1)

  • 1.0×101

  • 1.0×1030

  • 1.0×1010

  • 1.0×1010

Solution

D.

1.0×1010

Relation between Keq and Ecell is
straight E subscript cell superscript straight o space equals space fraction numerator 2.303 over denominator nF end fraction space log space straight K subscript eq straight E subscript cell superscript eq space equals space fraction numerator 0.0591 over denominator straight n end fraction space log space straight K subscript eq 0.591 space equals space fraction numerator 0.0591 over denominator 1 end fraction space log space straight K subscript eq log space straight K subscript eq space equals space 10 straight K subscript eq space equals space 1 space straight x space 10 to the power of 10

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