A solution of unknown pH is placed in the hydrogen compartment of a galvanic cell, with the H2 pressure maintained at 1 atm. The other half-cell compartment consists of a Cu/Cu2+ electrode with [Cu2+] = 1.00 M. If the overall cell potential at 25°C is +0.65 V, which describes the hydrogen component?
a) Hydrogen is the anode with a [H+] > 1.0 M.
b) Hydrogen is the cathode with a [H+] > 1.0 M.
c) Hydrogen is the anode with a [H+] < 1.0 M.
d) Hydrogen is the cathode with a [H+] < 1.0 M.