The e.m.f. of a cell corresponding to the reaction An + 2 H^+ (aq) -> Zn^(2+) (0.1M) + H_2(g) (1 atm) is 0.26 volt

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Q 2662067835.     The e.m.f. of a cell corresponding to the reaction

An + 2 H^+ (aq) -> Zn^(2+) (0.1M) + H_2(g) (1 atm) is 0.26 volt at 25°C. Calculate the pH of the solution at the hydrogen electrode.

E_(Zn^(2+)//Zn) ^o = -0.76 volt and E_(H^+//H_2) = 0

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