Question

Which of the below given options are correct for the electrolysis of aqueous copper sulphate solution with platinum electrode?

• A. Copper is oxidized.
• B. oxygen is evolved at cathode
• C. Platinum is deposited
• D. oxygen is evolved at anode

Answer 1

The correct option is D

oxygen is evolved at anode

The ions present in the solution are $C{u}^{2+}$,$H^{+}$,${S{O}_4}^{2-}$ and $O{H}^{-}$, during the electrolysis of aqueous copper sulphate solution with platinum electrode,below are the reactions happening at cathode and anode.

At Cathode:$C{u}^{2+}+2e^{-}\to Cu$

At anode:$O{H}^{-}\to OH+e^{-}$

$4OH\to 2H_{2}O+O_2$

Here the oxygen is evolved at anode.