Question

predict the product of electrolysis in each of the following (i) an aqueous solutionof AgNO3 using Pt electrode (ii) an aqueous solution of H2SO4 using Pt electrode​

Answer 1

Answer:

(ii) An aqueous solution of AgNO

3

with platinum electrodes.

At cathode: Silver ions have lower discharge potential than hydrogen ions. Hence, silver ions will be deposited in preference to hydrogen ions.

At anode: Hydroxide ions having lower discharge potential will be discharged in preference to nitrate ions. Hydroxide ions will decompose to give oxygen.

4OH

−

(aq)→2H

2

O(l)+O

2

(g)+4e

−

(iii) A dilute solution of H

2

SO

4

with platinum electrodes.

At cathode: 2H

+

+2e

−

→H

2

(g)

At anode: Hydroxide ions having lower discharge potential will be discharged in preference to sulphate ions. Hydroxide ions will decompose to give oxygen.

4OH

−

(aq)→2H

2

O(l)+O

2

(g)+4e

−