Question

In the electrolysis of aqueous CuBr₂ using Pt electrodes

• A. Br₂ gas is evolved at the anode
• B. Cu(s) is deposited at the cathode
• C. Br₂ gas is evolved at anode and H₂ gas at cathode
• D. H₂ gas is evolved at anode.

Answer 1

Answer: (A), (B)

Br₂ gas is evolved at the anode, Cu(s) is deposited at the cathode

Answer 2

Electrolysis of aqueous CuBr₂ involves the reduction of Cu²⁺ to Cu(s) at the cathode due to its higher reduction potential compared to water. At the anode, Br⁻ is oxidized to Br₂(l) due to its lower reduction potential compared to water. Therefore, Cu(s) is deposited at the cathode and Br₂ is evolved at the anode. Both statements (A) and (B) accurately describe these processes.