教学实践中发现:过氧化氢溶液受热沸腾时产生了大量的水汽,干扰了氧气的检验,需要从排除水汽干扰上对装置进行改进,增强实验的可见度和有效性。 Teaching practice found that: Hydrogen peroxide solution heated boiling generated a lot of water vapor, interfering with the oxygen test, the need to exclude water vapor interference on the device to improve and enhance the visibility and effectiveness of the experiment.