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Question

In the standard hydrogen electrode,which hydrogen is reduced and which one is oxidised?

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Solution

If S.H.E acts as anode..

The hydrogen gas of the electrode gets oxidised to produce H+ ions.

H2(g)→ H+ +2e-

If S.H.E act as cathode...

The hydrogen ion of the HCl solution gets reduced to form hydrogen gas.

H+ +2e- →H2(g)


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