1 For the diprotic weak acid H2A, Ka1 2 5 10 6 and Ka2 7 5 10 9 ...

1.For the diprotic weak acid H2A, Ka1 = 2.5 Ã— 10-6 and Ka2 = 7.5 Ã—...

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Chemistry

1.For the diprotic weak acid H2A, Ka1 = 2.5 Ã— 10-6 and Ka2 = 7.5Ã— 10-9. What is the pH of a 0.0400 M solution of H2A? What are theequilibrium concentrations of H2A and A2â€“ in this solution?
2.HClO is a weak acid (Ka = 4.0 Ã— 10â€“8) and so the salt NaClOacts as a weak base. What is the pH of a solution that is 0.026 Min NaClO at 25 Â°C?
3.NH3 is a weak base (Kb = 1.8 Ã— 10â€“5) and so the salt NH4Clacts as a weak acid. What is the pH of a solution that is 0.057 Min NH4Cl at 25 Â°C?

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Ques 1 Since Ka1 Ka2 then nearly all of the H3O produced comes from the first hydrolysis reaction Molarity H2A H2O H3O HA Initial 00400 0 0 Change x x x Equilibrium 00400x x x Ka1 H3OHA H2A xx 00400x 25 x 106 x2 00400x 25 x 106 because See Answer

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