“化学反应速率和限度”第一课时教学设计

• 作 者: 高云
• 机 构: 甘肃省兰州市第一中学,
• 出 处: 数理化学习(高中版)
• 发表日期: 2017年10期
• 关键词: 化学反应速率 教学设计

本节课来源于人类生活实践的体验,即从已有的生活经验定性描述化学反应快慢,逐渐转化为定量描述,化学反应速率的概念是随着人类认知过程而产生.在教学设计过程中,为体现这种思想,对于教材进行重新整合,化学是以实验为基础的自然学科,故由实验制备出现的问题引入本节课题,采用问题串设计教学内容.本课重难点影响化学反应的因素,采用对比实验法探究化学反应速率影响因素,归纳总结相应结论,同时渗透控制变量思想在学科中的作用.利用实验资源,由定性转为定量描述引出化学反应速率概念,使得知识系统化,有利于学生的有效学习.

This lesson comes from the experience of human life practice, that is, from the existing life experience qualitative description of chemical reaction speed, gradually transformed into quantitative description, the concept of chemical reaction rate is generated with the human cognitive process.In the process of teaching design , In order to embody this kind of thinking, to reintegrate teaching materials, chemistry is a natural subject based on experiment, so the problems arising in experiment preparation are introduced into this section of the subject and the problem string is used to design the teaching content. Factor, the comparative experiment method was used to explore the influencing factors of chemical reaction rate, and the corresponding conclusions were summarized and the role of control variables in infiltration was summarized.Using the experimental resources, the concept of chemical reaction rate was derived from qualitative to quantitative description, which made the systematization of knowledge, It is good for students to learn effectively.