Give the chemical equation for the reactions occurring at the anode during the electrolysis of copper sulphate solution using a platinum anode.

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Solution

Electrolysis of copper sulphate solution using a platinum anode
Chemical equation
During the electrolysis of copper sulphate
$\underset{Copper Sulphate}{{CuSO}_{4} (aq)} \overset{Electricity}{\to} \underset{Copper ion}{{Cu}^{2 +}} + \underset{Sulphate ion}{{SO}_{4}^{2 -}}$
Ions present
${Cu}^{2 +}, H^{+}, {SO}_{4}^{2 -}, {OH}^{-}, H_{2} O$
At cathode
${Cu}^{2 +} + 2 e^{-} \to Cu$
At anode
$4 {OH}^{-} - 4 e^{-} \to 4 OH 2 OH + 2 OH \to 2 H_{2} O + O_{2}$
Observation
Oxygen $(O_{2})$ is evolved at the anode and reddish brown Copper $(Cu)$ is deposited at the cathode.

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