The overall redox equation for the voltaic cell can be written as ^^^. What is being reduced in this forward reaction?

Answer:
Cu⁺² is being reduced in that reaction.
Explanation:
When a substance is reduced, its oxidation number is reduced -changing to a lower value than original-.
Cu⁺² turned into Cu. Meaning that the oxidation number changed from +2 to 0.
Thus, Cu⁺² is being reduced in that reaction.