(i) Pt (s) H2(g,0.1 bar) H+ (aq.,1 M) Cu2+(aq.,1M) Cu
(ii) Pt(s) H2 (g, 1 bar) H+ (aq.,1 M) Cu2+ (aq.,2 M) Cu
(iii) Pt(s) H2(g, 1 bar) H+ (aq.,1 M) Cu2+ (aq.,1 M) Cu
(iv) Pt(s) H2 (g, 1 bar) H+(aq.,0.1 M) Cu2+ (aq.,1 M) Cu
Correct Answer: (iii) Pt(s) H2(g, 1 bar) H+ (aq.,1 M) Cu2+ (aq.,1 M) Cu
Explanation: A typical hydrogen electrode as an anode connected to the Cu as the cathode measures the cell power of the Cu electrode.