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铁和铝都是化学性质较活泼的金属,能与一些非金属反应,如O_2、Cl_2、S等。其中铁和铝在氧气中燃烧是学习相关章节内容时所必做的两个经典实验,铁在氧气中燃烧时火星四射,发出“嚓嚓”的声音,铝在氧气中剧烈燃烧,发出耀眼的白光。这两个实验的实验现象能帮助学生理解铁和铝是化学性质较活泼的金属,同时,实验现象还能给学生产生强烈的视觉冲击,增强学生学习的兴趣和热情。然而,在高中学习铁的性质时,教师往往因为觉得要在课堂制取氧气有点麻烦,所以常采取以回忆初中做过的铁在氧气中燃烧的实验情境的方式介绍铁与氧气反应;在
Iron and aluminum are chemically more active metals that react with some non-metals, such as O 2, Cl 2, S, and the like. Iron and aluminum in the combustion of oxygen in the relevant chapters to learn the contents of the two classic experiments must be done, the iron in the combustion of oxygen sparks radiating “Cha Cha ” voice, aluminum in the violent combustion, Glowing dazzling white light. The experimental phenomena of these two experiments can help students understand that iron and aluminum are chemically more active metals. At the same time, the experimental phenomena can also have a strong visual impact on students and enhance students’ interest in learning and enthusiasm. However, when studying the nature of iron in high school, teachers often find it troublesome to make oxygen in the classroom. Therefore, teachers often introduce the reaction of iron and oxygen in a way that recalls the experiments of iron burning in oxygen in junior high school.