Problem: A triprotic acid H3A has pka1 = 2.00, pka2 = 5.00 and pka3 = 8.00. At what pH is [HA2-] = [A3-]?

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A triprotic acid H3A has pka1 = 2.00, pka2 = 5.00 and pka3 = 8.00. At what pH is [HA2-] = [A3-]?

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