Question

Which of the following can act both as Bronsted acid and Bronsted base

• A. $C{l}^{-}$
• B. $HC{O}_3^{-}$
• C. $H_3{O}^{+}$
• D. $O{H}^{-}$

Answer 1

The correct option is B

$HC{O}_3^{-}$

Those substance accept the proton are called Bronsted base and which is

donate the proton are called Bronsted acid.

$HC{O}_3^{-}+H^{+}\rightleftharpoons H_{2}C{O}_3$ Bronsted base.

$HC{O}_3^{-}\rightleftharpoons H^{+}+C{O}_3^{2-}$ Bronsted acid.