Which of the answers below is INCORRECT for diprotic acids and bases? Solutions

Question

Which of the answers below is INCORRECT for diprotic acids and bases?

Solutions of H2A are treated as monoprotic to calculate [H+], [HA] and [H2A].

Solutions of A2 is treated as monobasic to calculate [OH], [HA], and [A2].

The pH for HA solutions is approximated with pH = ½(pK1 + pK2).

Ka1Kb1 = Kw and Ka2Kb2 = Kw

Solutions of H2A are treated as monoprotic to calculate [H+], [HA] and [H2A].

Solutions of A2 is treated as monobasic to calculate [OH], [HA], and [A2].

The pH for HA solutions is approximated with pH = ½(pK1 + pK2).

Ka1Kb1 = Kw and Ka2Kb2 = Kw

Explanation / Answer

Option D is incorrect

During acid base dissociation,

Ka1 * Kb2 = Kw

Ka2 * Kb2 = Kw

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