1.

Why cannot sodium and potassium be prepared by the electrolysis of their aqueous solutions ?

Answer»

Solution :The electrode potential , i.e., reduction potential of Na `(-2*71 V)` or `K(-2*92)` is much LOWER than that of `H_(2)O (-0*83V)` , THEREFORE , upon ELECTROLYSIS , water gets reduced in preference to `Na^(+)` or `K^(+)` ions. In other words , sodium and potassium cannot be obtained by electrolytic reduction of `Na^(+)` or `K^(+)` ions in AQUEOUS solution .


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