## Chemistry: The Central Science (13th Edition)

Acting like an Acid: $H{SO_3}^-(aq) + H_2O(l) --> S{O_3}^{2-}(aq) + H_3O^+(aq)$ Acting like a Base: $H{SO_3}^-(aq) + H_2O(l) --> H_2{SO_3}(aq) + OH^{-}(aq)$
When the ion acts like an Acid, it gives one proton to water: $H{SO_3}^-(aq) + H_2O(l) --> {SO_3}^{2-}(aq) + H_3O^+(aq)$ When the ion acts like a Base, it receives one proton from water: $H{SO_3}^-(aq) + H_2O(l) --> H_2{SO_3}(aq) + OH^{-}(aq)$