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一、教材分析本实验是以人教版九年级上册第二单元课题3“氧气的制取”为背景,这是学生初次接触气体制备的实验,是初中化学学习的一个重要实验,为后面学习气体的制取奠定了一定的基础。本节内容是对课题3的延伸,学习好本节内容可以为前面章节学习的理论和实验知识补充感性认识的材料,并且激发学生的学习兴趣,同时又为后面学习“影响化学反应速率的因素”打下基础,起到了一个承上启下的作用。二、学情分析本节课的合作对象是初三学生,根据学生的情况做以下分析:在知识储备上,学生在过氧化氢的分解反应和氯酸钾的分解反应中,初步认识了催化剂,掌握了过
First, the textbook analysis This experiment is based on the People’s Education Edition ninth grade on the second unit subject 3 “oxygen system ” as the background, which is the first students contact gas preparation experiment is an important experiment in junior high school chemistry learning, as Preparation of learning gas behind laid a solid foundation. This section is an extension to Question 3, and learning how to use this section to supplement the perceptual knowledge of theoretical and experimental knowledge learned in the previous chapters, and to stimulate students’ interest in learning while at the same time influencing the rate of chemical reaction Factor "lay the foundation, played a role in supporting. Second, the academic analysis of this class of cooperation is the first three students, according to the students to do the following analysis: In the knowledge base, students in the decomposition of hydrogen peroxide and potassium chlorate decomposition reaction, the initial understanding of the catalyst to master Had it