论文部分内容阅读
沪教版初中化学教材第六章涉及许多的概念,如固体物质的溶解度及影响因素,溶液的饱和与不饱和及转变方法,溶液的浓、稀与溶液饱和与不饱和的关系等,学生在学习这些知识时,往往会出现概念不清、判断不明、应用时对条件丢三落四的现象。如何让学生正确掌握这并引起概念?在教学中,笔者采用了数形法,使用固体物质的溶解度曲线图,对上述概念进行理解和掌握。介绍如下,供同学们参考。
Shanghai Jiaozuo Edition junior high school chemistry textbook Chapter VI covers many concepts, such as the solubility of solid material and influencing factors, solution saturation and unsaturation and transformation methods, the concentration of the solution, the relationship between dilute and solution saturation and unsaturation, students in Learning these knowledge, often there is unclear concepts, judgments are not clear, the application of the conditions thrown to the bottom of the phenomenon. How to make students correctly grasp this and cause the concept? In teaching, I used the number shape method, the use of solid solubility curve, to understand and master the above concepts. Described below, for students reference.