Textbook Problem

In each of the following chemical equations, identify the conjugate acid—base pairs.

a. $\text{HF}\left(\text{aq}\right){\text{+H}}_{\text{2}}\text{O}\left(\text{l}\right)\rightleftharpoons {\text{F}}^{\text{-}}\left(\text{aq}\right){\text{+H}}_{\text{3}}{\text{O}}^{\text{+}}\left(\text{aq}\right)$b. ${\text{CN}}^{-}\left(\text{aq}\right)+{\text{H}}_{\text{2}}\text{O}\left(\text{l}\right)\rightleftharpoons \text{HCN}\left(\text{aq}\right)+{\text{OH}}^{-}\left(\text{aq}\right)$

c. ${\text{HCO}}_{\text{3}}{}^{\text{-}}\left(\text{aq}\right){\text{+H}}_{\text{2}}\text{O}\left(\text{l}\right)\rightleftharpoons {\text{H}}_{\text{2}}{\text{CO}}_{\text{3}}\left(\text{aq}\right){\text{+OH}}^{\text{-}}\left(\text{aq}\right)$