Predict the products of electrolysis in each of the following ?
An aqueous solution of `CuCl_(2)` with platinum electrodes.

Explanation

An aqueous solution of `CuCl_(2)` with platinum electrodes. Both `CuCl_(2)` and water ionise as usual.
`CuCl_(2) overset( aq) ( hArr) Cu^(2+)(aq) + 2Cl^(-)(aq)`
`H_(2) O ( l ) hArr H^(+)( aq) + OH^(-)( aq)`
At cathode `Cu^(2+)` ions will be reduced preferentially due to less discharge potential than `H^(+)` ions.
`Cu^(2+)(aq) + 2e^(-) rarr Cu(s)`
Copper metal is deposited at cathode.
At anode `Cl^(-)` ions will be discharged in preference to `OH^(-)` ions and chloride gas is produced at anode.
`Cl^(-)(aq) rarr Cl ( g) + e^(-)`
`Cl ( g) + Cl ( g) rarr Cl _(2)( g)`