A cell which generated a potential as a result of differing concentrations.



The potential is given by

And also by

So defining
to be the "standard" concentration,

Equating (4) and (6) gives

where






(1)

(2)

(3)
The potential is given by

(4)
And also by

(5)
So defining


(6)
Equating (4) and (6) gives

(7)
where





(8)
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