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配制溶质质量分数一定的溶液是初中化学中的一个重要的实验配制溶质质量分数一定的溶液是初中化学中的一个重要的实验,它涉及量筒它涉及量筒、玻璃棒、托盘天平等多种常用仪器的使用,涵盖药品取用用、物质溶解等多个基本操作,历来都是考试的热点,因此,必须熟练掌握练掌握。现就仪器选用、操作分析、步骤排序等三考点,精选典型试
Preparation of solute mass fraction of a solution is an important experiment in junior high school chemistry Preparation of solute mass fraction of a solution is a junior high school chemistry experiment is important, it involves measuring cylinder it involves measuring cylinder, glass rod, tray balance and other commonly used instruments Use, covering access to drugs, material dissolution and other basic operations, has always been a hot exam, therefore, must be proficient in practice. Now on the instrument selection, operation analysis, step sorting and other three test points, select the typical test