In aqueous solution, boric acid behaves as a weak acid (pKa = 9.1) and the following equilibrium is established:
B(0H)3(aq)+2H20(l)
⇌ [B(OH)4]–(aq) + [H30]+(aq)
(a) Draw the structures of B(OH)3 and [B(OH)4]–
(b) How would you classify the acidic behaviour of B(OH)3?
(c) The formula of boric acid may also be written as H3BO3; compare the acidic behaviour of this acid with that of H3PO3.
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