First slide

Electrolysis

Question

What will happen during the electrolysis of aqueous solution of CuSO₄ in the presence of copper electrodes?

Moderate

A

Copper will deposit at cathode
B

Copper will dissolve at anode
C

Oxygen will be released at anode
D

Copper will deposit at anode

Solution

Electrolysis of CuSO₄ can be represented by following two half-cell reactions
$\begin{aligned} At cathode {Cu}^{2 +} + 2 e^{-} ⟶ Cu (s) \\ At anode Cu (s) ⟶ {Cu}^{2 +} + 2 e^{-} \end{aligned}$
Here, Cu will deposit at cathode while copper will dissolved at anode.

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