Question

Copy and complete the following sentences ?

With platinum electrodes hydrogen is liberated at the ........... and oxygen at the .......... during the electrolysis of acidified water.

Answer 1

During the electrolysis of acidified water with platinum electrodes, $H^{+}$ ion is reduced at cathode and so hydrogen is liberated at the cathode whereas $O^{-2}$ ion is oxidized at anode and thus oxygen is liberated at the anode.