A dilute solution of sodium sulphate in water is electrolysed using Pt electrodes. What are the products formed at cathode an anode respectively?
Answer & explanation
Correct answer: option 1
Na2SO4 ⇔ 2Na+ + SO42-
H2O ⇔ H+ + OH-
At anode: 2OH- → H2O + \(\frac{1}{2}\)O2 + 2e-
At cathode: 2H+ + 2e- → H2