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