InterviewSolution
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InterviewSolution
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Which of the following changes will increase the `EMF` of the cell `:` `Co(s)|CoCl_(2)(M_(2))||HCl(M_(2))||(H_(2),g)Pt`A. Increae in the volume of `CoCl_(2)` solution from `100mL` to `200mL`.B. Increase `M_(2)` from `0.1 M` to `0.50M`.C. Increase the pressure of the `H_(2)(g)` from `1.0` to `2.0 atm`.D. Increase `M_(1)` from `0.01M` to `0.50M`. |
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Answer» Correct Answer - b `Co+2H^(o+) rarr Co^(2+)+H_(2)` `Q=([Co^(2+)])/([H^(o+)]^(2))` `E=E^(c-)-(0.0591)/(2) log .([Co^(2+)])/([H^(o+)]^(2))` `E` will increase when `[H^(o+)]` increases of `[Co^(2+)]` decreases. |
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