一、实验背景硫在氧气中燃烧的演示实验,主要是引导学生观察与比较硫在空气中和在氧气中燃烧有什么不同。该实验设计至少有两个问题需要克服:一是反应产生的二氧化硫是有毒气体;二是把少量硫放在铁质或铜质燃烧匙里燃烧,会损坏燃烧匙,干扰学生准确观察实验现象。现对实 First, the experimental background Sulfur combustion experiments in oxygen, mainly to guide students to observe and compare the sulfur in the air and burning in oxygen what is the difference. The experimental design of at least two problems to be overcome: First, the reaction of sulfur dioxide is toxic gas; the second is to put a small amount of sulfur burning iron or copper burning spoon, will damage the burning spoon, interfere with the students to observe the experimental phenomenon accurately. Right now