Question

Volume of gas evolved at anode
when CuSO4 (aq) is electrolyzed by
using 2F electricity at S.T.P will be
la) 11.21
(6) 22.4L
(6) 33.6L
to 1.12L​

Answer 1

Answer:

(6) 33.6L

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Answer 2

The volume of gas evolved at the anode when CuSO4 (aq) is electrolyzed by using 2F electricity at S.T.P will be a) 11.21.

• At the anode, oxidation occurs and reduction occurs at the cathode.
• Cathode reaction: Cu2+ +2e- -----> Cu
• 2e- = 2F of electricity is used in this reaction.
• Anode reaction: H2O -----> 2H+ +2e- + 0.5O2.
• A half mole of Oxygen is evolved at the anode when using 2F of electricity.
• At STP, 1 mole = 22.4 L
• So, the volume of O2 at STP = 0.5 × 22.4 = 11.2 litre.