In the electrolysis of aqueous copper sulphat | vedclass

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Question

(A) During the electrolysis of aqueous $CuSO_4$ with inert electrodes (like platinum),the following reactions occur: At the cathode,$Cu^{2+}$ ions are

Vedclass · Accepted Answer

$O_2$ and $H_2$

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(A) During the electrolysis of aqueous $CuSO_4$ with inert electrodes (like platinum),the following reactions occur: At the cathode,$Cu^{2+}$ ions are reduced to $Cu$ metal,but if the concentration is low or considering the standard reduction potentials,$H_2O$ can also be reduced. However,typically $Cu$ deposits. If the question implies the evolution of gases,we consider the water decomposition reactions: Cathode: $2H_2O + 2e^- 	o H_2(g) + 2OH^-(aq)$ Anode: $H_2O 	o 2H^+(aq) + \frac{1}{2}O_2(g) + 2e^-$ Thus,the gas evolved at the cathode is $H_2$ and at the anode is $O_2$.

In the electrolysis of aqueous copper sulphate $(CuSO_4)$ using inert electrodes,the gases evolved at the anode and cathode are,respectively:

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