论文部分内容阅读
学完铝热反应后,常听学生问,“用更活泼的钠代替铝行吗?”“有没有钠热反应”等类问题。这是学生的简单类比,教师若能正确加以引导,则会大大激发学生的求知欲,起到启迪学生智力的作用。 根据学生已有知识:金属氧化物越稳定,则还原成金属单质就越困难。正是基于这种认识,艾林汉在1944年首次作出解决此类问题的艾林汉图,可方便的看出哪种金属氧化物更加稳定。由于此图不属中学化学范围,所以仅在此浅析上述问题,并得出一些常用结论。
After learning about the aluminothermic reaction, I often listened to students and asked, “Is there a more active sodium instead of aluminum?” and “Is there a sodium-heat reaction?” This is a simple analogy for students. If teachers can guide them correctly, they will greatly stimulate students’ curiosity and play a role in enlightening their intelligence. According to students’ knowledge, the more stable the metal oxide is, the more difficult it is to reduce to metal elements. It is based on this understanding that Ailinhan made the first time in 1944 to solve the problem of Ailin Hantu, which can easily see which metal oxide is more stable. Since this map is not a chemical scope of middle school, we only analyze the above problems and draw some common conclusions.