On electrolysis of dil. sulphuric acid using Platinum (Pt) electrode, the product obtained at anode will be (1) Oxygen gas (2) H2S gas (3) SO2 gas (4) Hydrogen gas

Question

On electrolysis of dil. sulphuric acid using
Platinum (Pt) electrode, the product obtained
at anode will be
(1) Oxygen gas
(2)

H2

S gas
(3) SO2 gas
(4) Hydrogen gas

Solution: (1)

During the electrolysis of dil. sulphuric acid using Pt electrodes, at anode the oxidation of water would take place instead of sulphate ions since water has lower reduction potential (preference for oxidation) resulting in release of oxygen gas

 

 

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