The cell can be represented as:
Cu(s)|Cu2+(aq)||Ag+(aq)|Ag(s)
and we have Ecell = Eright – Eleft = EAg+úAg – ECu2+úCu
(2 7)
The potential of individual half-cell cannot be measured We can
measure only the difference between the two half-cell potentials that
gives the emf of the cell If we arbitrarily choose the potential of one
electrode (half-cell) then that of the other can be determined with respect
to this