Hi Faiza,
Well as far as I know then the values olfor electrode potential of calomel electrode are as follows,
1. Ecal (saturated with KCl)= +0.242V
2. E°cal = +0.27
3. Ecal (1M KCl solution) = +0.283
These are some of the values given for a calomel electrode and it's potential.
I hope this information helps.
All the best.
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