在初中化学氧气的性质这个实验中,有磷、硫在纯氧中燃烧的实验。按照教科书的要求做,经常遇到的问题是,做过几次实验后,燃烧匙就被污染或者被烧坏,需要经常更换燃烧匙。因燃烧匙被污染,很难看到兰紫色的火焰。可做如下改进:以磷在氧气中燃烧的实验 In the experiment of chemical oxygen in junior high school, there was an experiment of phosphorus and sulfur burning in pure oxygen. According to the requirements of textbooks, the most frequently encountered problem is that after several experiments, the burning spoons are contaminated or burned, and the burning spoons need to be replaced frequently. Because the burning spoon is contaminated, it is difficult to see the blue-violet flame. The following improvements can be made: Experiments with phosphorus burning in oxygen