Question

Classify the following as acid or base according to Bronsted-Lowry concept.
(i) $C{H}_{3}CO{O}^{-}$
(ii) $H_3{O}^{+}$
(iii) $S{O}_4^{2-}$
(iv) HCl

• A. (i) - Bronsted base; (ii) - Bronsted base; (iii) - Bronsted base; (iv) - Bronsted acid
• B. (i) - Bronsted acid; (ii) - Bronsted acid; (iii) - Bronsted acid; (iv) - Bronsted base
• C. (i) - Bronsted base; (ii) - Bronsted acid; (iii) - Bronsted base; (iv) - Bronsted acid
• D. (i) - Bronsted acid; (ii) - Bronsted acid; (iii) - Bronsted base; (iv) - Bronsted base

Answer 1

The correct option is C (i) - Bronsted base; (ii) - Bronsted acid; (iii) - Bronsted base; (iv) - Bronsted acid

A Bronsted-Lowry base is a substance that accepts a proton in the form of a hydrogen atom. In contrast, the Bronsted-Lowry acid is the substance that donates the proton. As a result, the Bronsted-Lowry acid-base reaction produces a conjugate acid and a conjugate base.

(i) $C{H}_{3}CO{O}^{-}$ Bronsted base proton accetor.

(ii)$H_3{O}^{+}$ Bronsted acid proton donor.

(iii) $S{O}_4^{2-}$ Bronsted base proton accetor.

(iv) $HCl$ Bronsted acid proton donor.