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In a 0.5 M solution of a diprotic acid H2A (Ka1 -3.6 x 10-5 and Ka2...

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Chemistry

In a 0.5 M solution of a diprotic acid H2A(Ka1 -3.6 x 10-5 and Ka2 - 8 x10-12 at 25*C) What is the equilirbiumconcnetration of A2-?

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4.2 Ratings (656 Votes)
Let us write down the stepwise dissociation of the diprotic acid as H2A aq H2O I H3O aq HA aq Ka1 H3OHAH2A HA aq H2O l H3O aq A2 aq Ka2 H3OA2HA In both the cases we assume that the concentration of H2O l is virtually large enough to    See Answer
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