高中化学“次氯酸盐的性质”的项目式教学——84消毒液的使用指南

Practice of Teaching in Senior High School Chemistry Based on“The Properties of Hypochlorite”Project Learning:Guide to the Use of 84 Disinfectant

以"84消毒液的使用指南"为主题,开展高中化学"次氯酸盐的性质"的教学。学生通过完成"一张图说清消毒剂""探究84消毒液的漂白效果与酸碱性的关系""探究84消毒液的漂白效果与光照的关系""探究84消毒液的漂白效果与温度的关系""84消毒液与酒精混合会有氯气吗"等5个项目任务,理解了次氯酸盐的性质及漂白原理,培养了学生的文献检索能力、实验探究能力以及发展了学生的高阶思维能力。将文献查阅与学生实验相结合,让学生在真实问题的解决中,完成次氯酸盐的性质等相关知识的内化,是顺利完成本项目教学的关键。

With the theme of"the guide to the use of 84 disinfectant",the teaching of"the nature of hypochlorite"in senior high school chemistry was carried out.Students try to understand the nature and bleaching principle of hypochlorite by completing the following five tasks:"one picture to explain the disinfectant""explore the relationship between the bleaching effect of 84 disinfectant and the pH value""explore the relationship between the bleaching effect of 84 disinfectant and light""the relationship between the bleaching effect of 84 disinfectant and temperature"and"will there be chlorine gas in the mixture of 84 disinfectant and alcohol",It has trained the students’ability of literature search,experiment ability and the development of students’high-order thinking ability.The key to successfully complete the project teaching is the combination of literature review and students’experiments,in this way,students can complete the internalization of hypochlorite properties and other related knowledge in solving real problems.