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Answer on Physical Chemistry Question for preetu

Question #24165
Electrode potential of Standard hydrogen electrode is 0. Still is used as a primary referance electrode. justify.
Expert's answer
It's the same reason why 0 on the Celsius scale coincides with the melting point of water - we need a common baseline against which we can compare the temperature of other things. So in electrochemistry we give the hydrogen electrode a zero potential so that we have an objective baseline against which to compare all other electrodes. SHE is a Reference electrode that is why its electrode potential is taken as zero at standard conditions(at 298 K temp, 1atm pressure and at 1M concentration of HCl).

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