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At what pH of HCl slutionw ill hydrogen gas electrode show electrode potential of -0.118V? H_(2) gas is bubbled at 298 K and 1 atm pressure. |
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Answer» Solution :Writing ELECTRODE REACTION as REDUCTION reaction, `H^(+)+e^(-)to(1)/(2)H_(2)` APPLYING nernst equation, `E_(H^(+)//H_(2))=E_(H^(+)//H_(2))^(@)-(0.0591)/(1)"log"(1)/([H^(+)])=0+0.0591log[H^(+)]` or `-0.118=-0.0591pH` or `pH=2`(`becausepH=-log[H^(+)])` |
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