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| 1. |
Following two reactions can occurs at cathode in the electrolysis of aqueous sodium chloride. Na^(+)+e^(-)toNa(s),E_(Red)^(@)=-2.71V 2H_(2)O(l)+2e^(-)toH_(2)(g)+2OH^(-)(aq)E_(Red)^(@)=-0.83V Which reaction takes place preferentially and why? |
| Answer» Solution :As the standard REDUCTION potential of `H_(2)O` is greater than that of `Na^(+)` ION, reduction of WAER takes place preferentially, i.e., `H_(2)` is liberated at CATHODE. | |