7.25     Why is K_{a_{2}}<<K_{a}_{_{1}}  for  H_{2}SO_{4}  in water ?

Answers (1)

H_2SO_4 is a very strong acid in water mostly due to its first ionisation to H_3O^+ and HSO_4^-.The ionisation of HSO_4^- to H_3O^+ and SO_4^{2-} is minuscule. That is the reason why Ka2 << Ka1.

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