The standard EMF for the cell reaction, Zn+Cu2+→Cu+Zn2+ is 1.1 volt at 250C. The EMF for the cell reaction, when 0.1 M Cu2+ and 0.1 M Zn2+ solutions are used, at 250C is

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1.10 V

0.10 V

– 1.10 V

– 0.110 V

answer is A.

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Detailed Solution

Since the ratio Zn+2Cu+2remains same Ecell =Ecell o-0.05912log0.10.1=1.1 V

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