中学化学实验中常遇到气体与液体(溶液)之间的反应,例如,二氧化碳与氢氧化钠溶液的反应、氨气与稀盐酸的反应等。这些反应由于没有诸如沉淀生成、颜色变化等现象而不易观察其是否反应。为此,我们设计了一简单装置——气液反应演示器,可以清楚观察气体与液体(溶液)的反应现象。一、实验用品500 mL 三颈瓶1个.20 mL 医用注射器2支,气球1只,带孔大橡皮塞1个,小橡皮塞2个,带玻璃导管的橡皮寨1个。 Reactions between gases and liquids (solutions) are often encountered in chemical experiments in middle schools, for example, reaction of carbon dioxide with sodium hydroxide solution, reaction of ammonia gas with dilute hydrochloric acid, and the like. These reactions are not easy to observe whether they are reactive because they have no phenomena such as precipitation formation, color change, and the like. For this reason, we designed a simple device, a gas-liquid reaction demonstrator, to clearly observe the reaction of gas and liquid (solution). First, the experimental supplies 500 mL three-necked flask 1 .20 mL medical syringes 2, 1 balloon, a hole with a big rubber stopper, a small rubber stopper 2, a rubber pipe with a glass conduit 1 .