Predict the products of electrolysis obtained at the electrodes in each case when the electrodes used are of platinum :
(i) An aqueous solution of `AgNO_3`.
(ii) An aqueous solution of `H_2SO_4`.

Explanation

(i) `AgNO_(3)(aq) to Ag^(+) (aq) + NO_(3)^(-) (aq)`
`H_(2)O (l) to H^(+) (aq) + OH^(-) (aq)`
At cathode: `Ag^(+) (aq) + e^(-) to O_(2) + 2H^(+) (aq) +4e^(-)`
`H_(2)O(l) to H^(+) (aq) + OH^(-) (aq)`
At cathode: `2H^(+) (aq) + 2e^(-) to O_(2) + 2H^(+) (aq) + 4e^(-)`
or `2H_(2)O (l) to O_(2) + 4H^(+) (aq) + 4e^(-)`
Hydrogen gas is produced at the cathode and oxygen at the anode.