Why boric acid is a monobasic acid?

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Solution

Any acid is defined as mono basic or dibasic or tri basic depending upon its capacity of giving H⁺ion. Boric acid in water, accepts OH^- ion acting as lewis acid and water releases H⁺ ions. The reaction is :
B(OH)₃ + H₂O $\to$ H⁺ + [ B(OH)₄]^-
Thus boric acid is a monobasic acid.

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Similar questions

Boric acid is polymeric due to
(a) its acidic nature (b) the presence of hydrogen bonds
(c) its monobasic nature (d) its geometry

	Column - I		Column - II
(A)	Hypo phosphoric acid	(p)	All hydrogen are ionizable in water
(B)	Pyro phosphoric acid	(q)	Lewis acid
(C)	Boric acid	(r)	Monobasic in water
(D)	Hypo phosphorus acid	(s)	$s p^{3}$ hybridized central atom

B (O H)_{3}

H^{+}

B (O H)_{3} + H_{2} O ⇌ [B (O H)_{4}]^{-} + H^{+}, K_{a} = 5.9 \times 10^{- 10}

P^{H}

0.025 M

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