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Question- For the diprotic weak acid H2A, Ka1 = 2.2 10-5 and Ka2 = 6.4 x 10-7.

1) What is the pH of a 0.0550 M solution of H2A?

2) What are the equilibrium concentrations of H2A and A2- in this solution?

I just need a general explanation of it please- Thanks

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