一、知识特点本章知识有两个显著特点 ,可概括为两多 ,即概念多、计算多 .《溶液》一章必学概念有 1 3个 ,占全书概念的 1 /4还多 .其中溶质质量分数是这章最重要的概念 ,必须深刻理解其含义 ,掌握其应用 .初中化学中有三大类计算 ,即根据化学式的计算、根据化学方程式的计算和 First, the characteristics of knowledge This chapter has two significant characteristics of knowledge, can be summarized as more than two, that is, more concepts, more calculation. “Solutions” chapter has to learn the concept of 1 3, accounting for the whole book concept of 1 / 4 more. Among them, solute The quality score is the most important concept of this chapter. It is necessary to deeply understand its meaning and master its application. There are three types of calculations in junior chemistry: calculation based on chemical formula, calculation based on chemical equation and