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高中化学课本第一册,[实验5—5]压强对化学平衡的影响,用注射器做课堂演示实验,因容器小,现象不大明显,无法使全班学生都看得清。我们设计一套实验装置,经教学实践证明,效果很好。选两个(Ⅰ、Ⅱ)1000毫升的吸滤瓶,Ⅰ瓶配上橡胶塞、玻璃管、厚壁橡胶管和弹簧夹,并用抽气机抽为真空。Ⅱ瓶的支管口用胶头封闭(见图1)。
In the first volume of high school chemistry textbook, [Experiment 5–5] The effect of pressure on chemical balance was demonstrated by using a syringe as a classroom demonstration experiment. Since the container was small and the phenomenon was not obvious, the whole class could not be seen clearly. We designed a set of experimental devices that proved to be effective after teaching practice. Choose two (I, II) 1000 ml suction bottle, I bottle coupled with rubber stoppers, glass tubes, thick-walled rubber tubes and spring clips, and with a suction pump vacuum. The branch mouth of the II bottle was closed with a plastic head (see Figure 1).