Question

Why it is not possible to measure the single electrode potential?

Answer 1

the main difference between India number system and international number system is the placement

Answer 2

No it is not possible to measure the single electrode potential

Here is Explanation :-

simple we can’t measure potential of an electrode, but we can measure potential difference between two electrodes. Point is potential of one electrode is known in order to get the potential of other from potential difference.

say to measure the single electrode potential of Copper (right part) in Copper sulfate it is connected with standard hydrogen electrode (left part) and it is assumed that standard hydrogen electrode has the standard electrode potential (is assumed arbitrarily to) zero. Hence the potential difference is nothing but the standard electrode potential of Copper. Single electrode potential is the potential measured at any temperature and concentration, whereas standard electrode potential is measured only at 298 K and concentration 1 M.

So technically saying it is possible to measure single electrode potential by connecting it with another element whose single electrode potential is known. From the difference we can estimate SEP