ElectrochemistryMedium

Question

The reduction potential of hydrogen half cell will be negative if :

Options

A.p(H2) = 1 atm and [H+ = 1.0 M
B.p(H2) = 2 atm and [H+ = 1.0 M
C.p(H2) = 2 atm and [H+ = 2.0 M
D.p(H2) = 1 atm and [H+ = 2.0 M

Solution

2H+ + 2e- → H2 (g)
Eo ″ 0.059 log (here E is - ve when PH2 > [H+]2)
× 0.3010 = negative value

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