Question

What is the standard electrode potential for the half-reaction \( \text{Cu}^{2+} + 2e^- \rightarrow \text{Cu} \)?

• A. +0.34 V
• B. -0.34 V
• C. +1.10 V
• D. 0 V

Hint:

Remember: Standard electrode potentials are typically found in reference tables. A positive potential means the species is more likely to be reduced, while a negative potential indicates oxidation.

Answer 1

The Correct Option is A

Step 1: Understand the concept of standard electrode potential The standard electrode potential (E°) is a measure of the ability of a half-cell to gain or lose electrons relative to the standard hydrogen electrode (SHE), which is defined as 0 V. A positive potential indicates that the substance tends to gain electrons (reduction), while a negative potential indicates that the substance tends to lose electrons (oxidation). Step 2: Check the standard electrode potential of copper From standard reference tables, the standard electrode potential for the half-reaction \( \text{Cu}^{2+} + 2e^- \rightarrow \text{Cu} \) is \( +0.34 \, \text{V} \). Answer: Therefore, the standard electrode potential for the half-reaction \( \text{Cu}^{2+} + 2e^- \rightarrow \text{Cu} \) is \( +0.34 \, \text{V} \). So, the correct answer is option (1).