First slide

Electrolysis

Question

A dilute aqueous solution of CuSO₄ is electrolyzed using platinum electrodes. The products at the anode and cathode are :

Easy

A

O₂, H₂
B

H₂, O₂
C

O₂, Cu
D

S₂O₈^2-, H₂

Solution

$E_{{Cu}^{2 +}}^{\circ} Cu > E_{H_{2} {OH}_{2}}^{\circ}; E_{{SO}_{4}^{2 -}}^{\circ} ∣ S_{2} O_{8}^{2 -} < E_{H_{2} {OO}_{2}}^{\circ}$

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