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For the diprotic weak acid H2A, Ka1 = 3.0 × 10-6 and Ka2 = 6.7 ×...

For the diprotic weak acid H2A, Ka1 = 3.0 × 10-6 and Ka2 = 6.7 × 10-9. What is the pH of a 0.0700 M solution of H2A? What are the equilibrium concentrations of H2A and A2– in this solution?

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