弱酸盐是由弱酸和碱中和得到的产物,分为弱酸正盐(如Na2CO3)和弱酸酸式盐(如NaHCO3)等．弱酸盐有关反应的离子方程式的书写,历年来是中学化学的重难点,初学者往往把握不好弱酸盐的性质而误写．本文结合弱酸盐的性质,从反应的本质上介绍有关弱酸盐反应的离子方程式的书写方法． The weak acid salt is a product obtained by the neutralization of weak acid and alkali, and is divided into weak acid positive salt (such as Na2CO3) and weak acid acid salt (such as NaHCO3). The writing of ion equations concerning the reaction of weak acid salts has been a major difficulty in chemistry for many years, and beginners often misunderstand the nature of weak acid salts. In this paper, the nature of the weak acid salt is introduced. From the nature of the reaction, the writing method of the ion equation for the weak acid salt reaction is introduced.