对书写质子等衡式的一点意见

Opinions of writing Proton Balance Equation

根据酸碱质子理论,当酸碱反应达到平衡状态时,酸碱之间质子转移的等衡关系称为质子平衡,其数学表达式叫做质子等衡式,用PBE(Proton Balance Equation)表示。PBE便于学生理解并对处理酸碱平衡问题有重要作用。目前PBE的导出有以下几种方法:①物料平衡——电荷平衡法;②零水准法[1-3];③状态法[4]。状态法在教学中使用的不多。现行教材中多以零水准法为主,因为它简洁、快速。但该方法对强酸、强碱体系,以及弱酸与其共轭碱、弱碱与其共轭酸体系的处理都不太方便,不易被学生掌握。

We present a new method of writing proton balance equation in this paper,it is de- scribed as the mothod of refrence level-state.In this method several substances that exist in solution and take part in proton transfer are first chosen as refrence level,then we write the proton balance equation in accordance with the concentration of refrence level's products at equilibrium and the original concentration of solute.we have obtained good results by used it for teaching.