The Half-Reaction That Occurs at the Cathode During Electrolysis of an Aqueous

Multiple Choice

The half-reaction that occurs at the cathode during electrolysis of an aqueous CuCl₂ solution is

A) Cu⁺ + e^- $\rarr$ Cu.
B) Cu²⁺ + e^- $\rarr$ Cu⁺.
C) 2H₂O + 2e^- $\rarr$ H₂ + 2OH^-.
D) Cl₂ + 2e^- $\rarr$ 2Cl^-.
E) 2Cl^- $\rarr$ Cl₂ + 2e^-.