試題詳解

22. An electrochemical cell consists of a standard hydrogen electrode and a copper metal electrode. What is the potential of the cell at 25℃ if the copper electrode is placed in a solution in which [Cu²⁺] = 2.5 × 10^-4 M. [Note: Cu²⁺(aq) + 2e^- → Cu(s), E⁰ = 0.34 V]
(A)0.23 V
(B)-0.16 V
(C)0.018 V
(D) 0.26 V
(E)0.059 V