Final answer:
A voltaic cell is an electrochemical cell that uses a spontaneous redox reaction to produce electrical energy. The oxidation half-reaction occurs at the anode, and the reduction half-reaction occurs at the cathode. In this case, the oxidation half-reaction occurs at the anode (Cu^2+ + 2e^- → Cu) and the reduction half-reaction occurs at the cathode (Zn → Zn^2+ + 2e^-).
Step-by-step explanation:
A voltaic cell, also known as a galvanic cell, is an electrochemical cell that uses a spontaneous redox reaction to produce electrical energy. In this case, the voltaic cell is constructed using the following half-reactions:
Option 1: Oxidation: Zn → Zn^2+ + 2e^- , Reduction: Cu^2+ + 2e^- → Cu
Option 2: Oxidation: Cu^2+ + 2e^- → Cu, Reduction: Zn → Zn^2+ + 2e^-
Option 3: Oxidation: Zn → Zn^2+ + 2e^-, Reduction: Fe^3+ + 3e^- → Fe
Option 4: Oxidation: Fe^3+ + 3e^- → Fe, Reduction: Zn → Zn^2+ + 2e^-
The oxidation half-reaction occurs at the anode, and the reduction half-reaction occurs at the cathode. In this case, Option 2 has the oxidation half-reaction occurring at the anode (Cu^2+ + 2e^- → Cu) and the reduction half-reaction occurring at the cathode (Zn → Zn^2+ + 2e^-).