Question

The reduction potential of hydrogen half-cell will be negative if
(a) p(H2) = 1 atm and [H+] = 2.0M
(b) p(H2) = 1 atm and [H+] = 1.0M
(c) p(H2) = 2 atm and [H+] = 1.0M
(d) p(H2) = 2 atm and [H+] = 2.0M

Answer 1

Ered will only be negative when pH2 > [H+]. So option (c) is correct.