Problem: In the electrolysis of an aqueous solution of Na2SO4, what reactions occur at the anode and the cathode (assuming standard conditions)?

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FREE Expert Solution

Na2SO4 dissociates as Naand SO42-

Na+ → gains electrons → reduction → cathode

SO42- → loses electrons → oxidation → anode


Possible cathode reactions:

2 H2O (l) + 2e- → H2 (g) + 2OH- (aq)       E = -0.83 V

Na+ (aq) + e→ Na (s)                             E = -2.71 V

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In the electrolysis of an aqueous solution of Na2SO4, what reactions occur at the anode and the cathode (assuming standard conditions)?