化学概念是将化学现象、化学事实经过比较、综合、分析、归纳、类比等方法抽象出来的理性知识,它是已经剥离了现象的一种更高级的形态,反映着化学现象及事实的本质,是核心学科知识体系的基础。化学概念是化学课堂教学的重点和难点,也是学好化学的关键。如何突破化学概念教学,是每个化学教师备课时一个重要的着力点。一、预估学生思维障碍,疏通学生思路 The concept of chemistry is the rational knowledge that has been abstracted from the comparison, synthesis, analysis, induction and analogy of chemical phenomena and chemical facts. It is a more advanced form that has been stripped of phenomena, reflecting the essence of chemical phenomena and facts, It is the foundation of the core subject knowledge system. The concept of chemistry is a key and difficult point in chemistry classroom teaching and also the key to learning chemistry well. How to break through the teaching of chemical concept is an important focus of every chemistry teacher preparing lessons. First, predict student’s thinking obstacle, clear student idea