Question

What is the standard reduction potential of a standard hydrogen electrode?

Answer 1

Think about it; you use the standard reduction potential for the standard hydrogen electrode as a reference standard. i.e. another standard reduction potential is in reference to that of the standard hydrogen electrode. So it must be `"0 V"`.

`2H^(+)(aq) + 2e^(-) -> H_2(g)`

CHALLENGE: The saturated calomel electrode is another commonly-used reference electrode, with a standard reduction potential of `"0.2444 V"` relative to the standard hydrogen electrode. Convert one standard reduction potential of your choice to be in reference to the saturated calomel electrode.

`Hg_2^(2+) + 2Cl^(-) -> Hg_2Cl_2(s)`