一、实验原理白磷或红磷的燃烧要消耗掉空气中的氧气 ,生成固体Ｐ2 Ｏ5 ,几乎不占气体空间。Ｐ4+ 5Ｏ2 =2Ｐ2 Ｏ5在密闭容器中 ,稍过量的磷燃烧停止后 ,容器中的氧气应被耗尽。为了防止出现因局部缺氧而使磷的燃烧停止的现象 ,实验中采用推动注射器的方法使空气流动 ,从而保证? First, the experimental principle White phosphorus or red phosphorus to burn off the oxygen in the air to generate solid P2O5, almost no gas space. P4 + 5O2 = 2P2 O5 in a closed container. Oxygen in the container should be depleted after a slight excess of phosphorus has ceased to ignite. In order to prevent the phenomenon that the burning of phosphorus is stopped due to local oxygen deficiency, the method of pushing a syringe is used in the experiment to make the air flow, so as to guarantee?