Question

What will be the conjugate bases for the following Bronsted acids: $HF,H_{2}S{O}_4$ and $HC{O}_3^{-}$?

Answer 1

Conjugate base for Bronsted acid.

Conjugate base of a Bronsted-Lowry acid is the species formed after an acid donates its proton. So, the conjugate bases will have a proton less.

$HF\to H^{+}+F^{-}$

$H_{2}S{O}_4\to H^{+}+HS{O}_4^{-}$

$HC{O}_3^{-}\to H^{+}+C{O}_3^{2-}$

Therefore, the corresponding conjugate bases are: $F^{–},HS{O}_4^{–}$ and $C{O}_3^{2-}$ respectively.