ElectrochemistryHard
Question
In the electrolysis of aqueous CuBr2 using Pt electrodes :
Options
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.
Solution
(A, B) At Cathode :
Cu2+ + 2e- → Cu(s)
2Br- + → Br2 + 2e-
__________________
Cu2+ + 2Br- → Br2 + Cu(s).
Cu2+ + 2e- → Cu(s)
2Br- + → Br2 + 2e-
__________________
Cu2+ + 2Br- → Br2 + Cu(s).
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