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人教版《化学2》73面实验3-2探究了乙醇与钠的反应,笔者根据教材中的实验方法进行实验,发现在实验过程中很难将生成的氢气点燃或者点燃后燃烧不连续,倒扣在火焰上方的烧杯中很难观察到有水滴生成。这主要是因为乙醇与钠反应过程非常平缓,且试管中空管体积较大,故难形成稳定纯净的氢气流。通过对本校其他教师的访谈,发现实验过程均存在同样的问题,这就排除了个人实验失误的因素。为了排除试管上部空
People’s Education Edition “Chemistry 2” 73 Surface Experiment 3-2 explored the reaction of ethanol and sodium, the author experiments based on experimental methods in the teaching materials found in the experiment is difficult to ignite the generated hydrogen or ignite after burning discontinuous, Inverted buckling in the beaker above the flame is difficult to observe the formation of water droplets. This is mainly because the reaction process between ethanol and sodium is very gentle, and the large volume of test tube hollow tube, it is difficult to form a stable and pure hydrogen flow. Through interviews with other teachers in our school, we found that the same problems existed in the experiment process, which ruled out the factors of individual experiment mistakes. In order to rule out the upper part of the test tube