二氧化硫是一种有毒的气体 ,如果按照通常的制取方法及性质实验时 ,二氧化硫容易外逸 ,污染室内空气 ,影响师生健康。为此我们设计了全封闭二氧化硫制取与性质实验演示装置 ,收到了较好的教学效果 ,现介绍如下 :1　实验用品广口瓶(1 0 0 0ｍＬ) 1只 ;分液漏斗 (5 0ｍＬ) 1个 ;? Sulfur dioxide is a toxic gas. If sulfur dioxide is easily tested in accordance with the usual preparation methods and properties, sulfur dioxide can easily escape and contaminate indoor air and affect the health of teachers and students. To this end, we designed a fully enclosed experimental device for the preparation and demonstration of sulfur dioxide, and received a good teaching effect. The following are introduced: 1 Experimental supplies wide-mouth bottle (1000ml) 1; Separating funnel (50mL) 1;