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