Predict the products of electrolysis in each of the following ?
An aqueous solution of `AgNO_(3)` with Platinum electrodes.

Explanation

As aqueous solution of `AgNO_(3)` with platinum electrodes.
In aqueous solution, ionisation of `AgNO_(3)` and `H_(2) O` occurs.
`AgNO_(3)(s) overset(aq) ( hArr ) Ag^(+) (aq) + NO_(3)^(-)( aq)`
`H_(2) O ( l ) hArr H^(+) ( aq) + HO^(-) ( aq) `
As platinum electrodes are non- attackable electrodes, they will not be reacted upon by `NO_(3)^(-)` ions.
At cathode Ag will be deposited at cathode.
`Ag^(+) ( aq) + e^(-) rarr Ag(s)`
At anode Out of `NO_(3)^(-)` and `OH^(-)` ions, only `OH^(-)` ions will be oxidised ( due to less discharge potential ) preferentially and `NO_(3)^(-)` ions will remain in the solution.
`OH^(-)( aq) rarr OH + e^(-)`
`4 OH rarr 2H_(2) O ( l ) + O_(2) (g)`
So, oxygen gas is produced at anode. The solution remains acidic due to the presence of `HNO_(3)`.
`H^(+) ( aq) + NO_(3)^(-)( aq) hArr HNO_(3)(aq)`