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一、问题的提出金属钠加热燃烧的实验是研究金属钠化学性质的重点实验,如果按照鲁教版的方法完成实验,发现金属钠燃烧产物的颜色问题一直没有得到满意的结果,观察到的往往是以黑色为主的物质,并且燃烧的过程很快,学生不易详细观察。燃后的产物几乎很难看到淡黄色的固体生成。二、现象分析对于这一现象也有很多的解释,主要有:(1)金属钠表面煤油的影响。(2)石棉网成分的影响。针对这种情况大部分的改进方案是要求用滤纸擦净钠表面
First, the issue raised Metallic sodium heating combustion experiment is to study the chemical properties of sodium metal key experiment, according to the Ru teach version of the method to complete the experiment and found that the color of sodium metal combustion products has not been satisfactory results, the observed often It is based on black material, and the combustion process is very fast, the students not easy to observe in detail. After burning the product is almost hard to see the light yellow solid generated. Second, the phenomenon of analysis There are many explanations for this phenomenon, are: (1) the impact of sodium metal surface kerosene. (2) the impact of asbestos net composition. Most improvements to this situation require the use of filter paper to wipe the sodium surface