我在讲“电解食盐水以制取氯气和烧碱”一节时,首先引导学生复习有关电解原理的简要知识后,即转入“食盐水电解”的演示实验。在进行仪器安装和操作时,一边操作,一边讲解,随着仪器、药品试剂的出现,提问学生,让学生对学过的仪器名称、形态反复认识复习,巩固基础知识。 When I was talking about the section “Electrolyzed salt water to make chlorine and caustic soda”, I first guided the students to review the brief knowledge about the electrolysis principle, and then transferred to the demonstration experiment of “Saline Solution Electrolysis”. During the installation and operation of the instrument, it is explained while operating. With the appearance of instruments and drug reagents, students are asked to ask the students to repeatedly review the name and form of the instrument they learned and to consolidate the basic knowledge.