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Following reactions occur at cathode during the electrolysis of aqueous copper (II) chloride solution:Cu2+(aq) + 2 e-2 ———–> Cu(s) E° = + 0.34 VH+(aq) + e-1 ————-> 1/2H2(g) E° = 0.00 VOn the basis of their standard reduction electrode potential (E°) values, which ...

Following reactions occur at cathode during the electrolysis of aqueous copper (II) chloride solution:

Cu2+(aq) + 2 e-2 ———–> Cu(s) E° = + 0.34 V

H+(aq) + e-1 ————-> 1/2H2(g) E° = 0.00 V

On the basis of their standard reduction electrode potential (E°) values, which reaction is feasible at the cathode and why ?

2 Answers

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Since E∘Cu2+/CuECu2+/Cu° has a greater positive value than E∘H+/HEH+/H°, the reaction that is feasible at the cathode is

Cu2+(aq) + 2e− → Cu(s)

Since E∘Cu2+/CuECu2+/Cu° has a greater positive value than E∘H+/HEH+/H°, the reaction that is feasible at the cathode is

Cu2+(aq) + 2e− → Cu(s)

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