Ka2 is very less than Ka1 for H2SO4 in water..y?

Ka1 is when H2SO4 gives HSO4- and H+.

Ka2 is when HSO4- gives SO42- and H+.

It is much easier for a neutral H2SO4 to release H+ than a negatively charged HSO4-. Hence Ka2 is much lesser than Ka1.

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