《酸碱盐》是初三化学最后一章,在全书中占有十分重要的地位,它是全书中的重点,也是全书中的难点.该章有四多:概念多、实验多、反应规律多、化学方程式多,要想学好和复习好这一章内容,根据笔者多年的教学体会,必须熟练掌握和正确辨析以下几个“一定”与“不 The “acid and alkali salt” is the last chapter of the third grade chemistry and it occupies a very important position in the book. It is the key point in the book and the difficulty in the whole book. There are more than four chapters in this chapter: concept, experiment and reaction law. There are many chemical equations. In order to learn and review the contents of this chapter, according to the author’s many years of teaching experience, we must master and correctly analyze the following “certain” and "not