Question

An electrode has a potential of 1.201 V with respect to a saturated silver-silver chloride electrode. What would the electrodes potential be relative to a saturated calomel electrode (S.C.E.)? E = 0.197 V for the saturated silver-silver chloride electrode and E = 0.241 V for the S.C.E.

Answer 1

Answer:

The potential wrt. calomel is 1.254 V

Explanation:

Given:

Potential wrt. silver chloride $E_{Ag} = 1.201$ V

Potential wrt. saturated silver chloride $E = 0.197$ V

Potential wrt. SCE $E_{Hg} = 0.241$ V

Now potential wrt. hydrogen is given by,

   $= 1.201- 0.197$

   $= 1.004$ V

And we find for potential wrt. calomel,

   $=$ potential wrt. hydrogen + potential wrt. SEC

   $= 1.004 +0.241$

   $= 1.254$ V

Therefore, the potential wrt. calomel is 1.254 V