HA, a weak acid, with K a = 1.0 * 10 -8 , also forms the ion
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HA, a weak acid, with Ka = 1.0 * 10-8, also forms the ion HA2–. The reaction is HA(aq) + A–(aq) ⇌ HA2–(aq) and its K = 4.0. Calculate the [H+], [A–], and [HA2–] in a 1.0 M solution of HA.
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