DThe ionization reactions of acids and bases in solvent are proton-transfer reactions. Example:the ionization of HF in water can be represented as HF(aq)-H++F(aq) H++H2O(1)-H3O*(aq) HF(aq)+H2O(1)=H3O*(aq)+F(aq) 2Water is an amphiprotic substance,its autoionization is also proton-transfer reaction. H中 H2O(I)+H2O(I)-H3O*(aq)+OH-(aq) acid(1) base(2) acid(2) base(1) ① The ionization reactions of acids and bases in solvent are proton-transfer reactions. Example: the ionization of HF in water can be represented as ② Water is an amphiprotic substance, its autoionization is also proton-transfer reaction. H+ acid(1) base(2) acid(2) base(1) HF(aq) H+ + F－(aq) H+ + H2O(l) H3O+ (aq) HF(aq) + H2O(l) H3O+ (aq) + F－(aq) H2O(l)+H2O(l) H3O+ (aq) +OH－(aq)