The standard reduction potential for Cu²⁺/Cu is 0.34 V. The reduction potential at pH = 14 is (Cu²⁺ + 2e⁻ → Cu, E⁰ = 0.34 V)
Q1. The standard reduction potential for Cu²⁺/Cu is 0.34 V. The reduction potential at pH = 14 is (Cu²⁺ + 2e⁻ → Cu, E⁰ = 0.34 V)
Answer: -0.22 V
Explanation: Using Nernst equation, E = E⁰ - 0.0591 / n log(1 / [Cu²⁺]), at pH 14, [Cu²⁺] is very low due to Cu(OH)₂ formation.