Practice 19. A copper-hydrogen cell is constructed and its cell potential is measured. The voltmeter indicates that the copper metal is the cathode. Cu(s) | Cu²+ (aq) || H₂(g), H* (aq) | Pt(s) ΔΕ= ? Write and label the half-reaction and net equations and calculate the standard reduction potential of the cell (refer to table at back of textbook, p. 805).

Fig: 1