生成醋酸铵(CH3COONH4)
CH3COOH + NH3 = CH3COONH3
而且,醋酸铵会发生双水解
CH3COO- + H2O --- CH3COOH + OH-
NH4+ + H2O --- NH3.H2O + H+
(注：“---”为可逆符号)