Question

What is the standard electrode potential of the half-reaction: \[ \text{Cu}^{2+} + 2e^- \rightarrow \text{Cu} \, (\text{solid})? \] Given that the standard electrode potential for the half-reaction: \[ \text{Ag}^+ + e^- \rightarrow \text{Ag} \, (\text{solid}) \quad \text{is} \, +0.80 \, \text{V}. \] Also, the cell potential for the following reaction is: \[ \text{Cu}^{2+} + 2\text{Ag} \rightarrow \text{Cu} + 2\text{Ag}^+ \] is \( 0.46 \, \text{V} \).

• A. \( 1.26 \, \text{V} \)
• B. \( 0.50 \, \text{V} \)
• C. \( 0.46 \, \text{V} \)
• D. \( 1.0 \, \text{V} \)

Hint:

The cell potential can be determined by subtracting the electrode potential of the anode from that of the cathode. For a reduction half-reaction, the standard electrode potential is positive.