在人教版高中化学《必修1》第二章第二节《离子反应》的教学中,有一个问题让我感到很困惑,即学生不能很好地建立起微粒观的思维模式。主要表现在:不会应用微粒观去分析离子反应的实质,不能正确书写离子方程式。虽然作了很多强调——要按照“写”、“拆”、“删”、“查”四个步骤来进行,注意易溶易电离的要拆、难溶难电离的不能拆, One of the problems in the PEP teaching chemistry of “Compulsory 1”, Chapter 2, Chapter 2, “I’m Confused,” is that students can not well establish the thinking mode of particle concept. Mainly in: Will not use the concept of particle analysis of the essence of ion reaction, can not correctly write ion equation. Although made a lot of emphasis - in accordance with “write ”, “demolition ”, “delete ”, “check ” four steps, pay attention to easy to dissolve ionization to demolition, Ionization can not be removed,