很多学生感到化学易学 ,但很难学好 ,主要难在运用化学知识解决问题上 ,常常是“一听就懂 ,一看就会 ,一做就错”。老师讲课听得懂 ,书上例题看得会 ,但当独立解答问题时 ,就错误百出 ,甚至束手无策。仔细分析以上现象 ,可以看出 :大部分学生在解题时存在学习障碍。因此 ,作为 Many students feel that chemistry is easy to learn, but it is difficult to learn well. It is difficult to use chemical knowledge to solve problems. Often it is “you can understand it at a glance, and you will do it right when you do it.” The teacher can understand the lesson and the examples on the book can be seen. However, when independently answering the questions, they are erroneous and even helpless. After careful analysis of the above phenomena, it can be seen that most students have learning disabilities in solving problems. So, as