First slide

Electrolysis

Question

A highly concentrate solution of potassium sulphate in water is electrolysed using inert electrodes. The products at the cathode and anode are respectively.

Easy

A

H₂,O₂
B

O₂, H₂
C

O₂, Na
D

H₂, S₂O₈^2-

Solution

$\begin{array}{l} ∵ E_{K^{+} ∣ K}^{\circ} < E_{H^{+} ∣ H_{2}}^{\circ} \\ E_{H_{2} O ∣ O_{2}} > E_{{SO}_{4}^{\circ}}^{2 -} ∣ S_{2} O_{8}^{2 -} \end{array}$

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