First slide

Standard EMF of a cell

Question

Standard electrode potential (reduction potential) becomes equal to cell potential, when

Easy

A

either anode or cathode is the hydrogen electrode
B

anode is the hydrogen electrode
C

cathode is the hydrogen electrode
D

None of the above

Solution

When anode is the hydrogen electrode, $E^{o} H_{2} = 0$
$E^{o} = {E^{o}}_{R} - {E^{o}}_{L} = {E^{o}}_{R} - 0 = {E^{o}}_{R}$

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