Question

An aqueous solution of boric acid is found to be weakly acidic in nature. This acidic character arises due to the following reasons.

• A. It is a protic acid which donates protons in aqueos solution.
• B. It is a lewis acid which abstracts $OH^{-}$ from water and leaves $H^{+}$ to make the solution acidic.
• C. It gives metaboric acid when dissolved in water.
• D. It is prepared by reaction of borax with sulphuric acid hence it behaves as an acid.

Answer 1

Answer: (B)

It is a lewis acid which abstracts $OH^{-}$ from water and leaves $H^{+}$ to make the solution acidic.

Answer 2

: It reacts with water to abstract $OH^{-}$ ions and releases $H_{3}O^{+}$ ions making it acidic.

$H_{3}BO_{3} + H_{2}O \rightarrow H_{3}O^{+} + H_{2}BO_{3}^{-}$