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“铝跟氧气反应没有镁那样容易。可是把铝粉或铝箔放在氧气里加热,铝也能燃烧,放出大量的热,同时发出耀眼的白光。但是,在空气里,只是在高温下,铝粉才能发生这样剧烈的变化。”高二化学(甲种本)第182页仅作了前面的叙述,未提供演示实验操作的方法,而学生很想看看铝在氧气中燃烧,到底亮到什么程度。为满足学生的求知欲,我经多次试验,找到一种现象明显、操作简便的方法。其具体操作步骤如下: 在铁三角架上放一块石棉网,将一角匙氯酸钾粉末平铺在这块石棉网的中央,面积
“Aluminum is as easy to react with oxygen as it is without magnesium, but when aluminum or aluminum foil is heated in oxygen, aluminum can burn, give off a lot of heat and emit bright white light, but in the air it is only at high temperatures that aluminum The dramatic changes in powder can occur. ”High School Chemistry (A) p. 182 only made the previous statement, providing no means of experimenting with the experiment, and students would love to see what the aluminum burns in oxygen, degree. In order to satisfy students' thirst for knowledge, I have tried many times to find a method that is obvious and easy to operate. The specific steps are as follows: Put a piece of asbestos in the iron tripod frame, a key potassium chlorate powder tiled in the asbestos net central area