1.

The standard oxidation potential of Ni//Ni^(2+) electrode is 0.236 V .If this is combined with a hydrogen electrode in acid solution , at what pH of this solution will be measured e.m.f be zero at25^@ C ? Assume that [Ni^(2+)] = 1M and P_(H_2) = 1 atm

Answer»


Solution :`Ni_((s)) + 2H^(+) to Ni^(+2) + H_2 , E= E^(0) - (0.059)/(2) log([Ni^(+2)]PH_2)/([H^(+)]^(2))`
` 0.0236 - (0.059)/(2) log [H^(+)]^(2) , 0.059 PH = 0.236, pH = 4 `


Discussion

No Comment Found

Related InterviewSolutions