Predict the products of electrolysis in each of the following:
An aqueous solution of AgNO3 with silver electrodes.
(i) At cathode:
The following reduction reactions compete to take place at the cathode.
`Ag_(aq)^+ e^(-) -> Ag_(s); E^@ = 0.80 V`
`H_(aq)^(+) +e^(-) -> 1/2 H_2(g); E^@ = 0.00 V`
The reaction with a higher value of `E^@` takes place at the cathode. Therefore, deposition of silver will take place at the cathode.
The Ag anode is attacked by `NO_3^(-)` ions. Therefore, the silver electrode at the anode dissolves in the solution to form Ag+.
Video Tutorials For All Subjects
- Electrolytic Cells and Electrolysis - Introduction