基于便捷理念的二氧化碳的制取及性质实验一体化设计

Integrated Experiment Design of Preparation and Properties of Carbon Dioxide Based on Convenience

CO2的制取与性质是初中化学的重要内容，教材中的实验较适合教师演示，不便于学生动手操作。本实验设计使用塑料杯、塑料点滴板和塑料注射器进行实验，实现了CO2的制取与性质（密度比空气大且不支持燃烧，以1：1溶于水，水溶液显酸性，能使澄清石灰水变浑浊）一体化，该设计实现了小型化，便于操作，更容易实现学生分组实验、动手参与的目的。同时，对实验设计的思维方法和策略进行提炼，以供其他实验改进参考。

Preparation and properties of CO2 are important content in junior high school chemistry. The experiments in textbooks were usually demonstrated by teachers, rather than op- erated by students. Using plastic cups, plastic spot plates and plastic syringes, this paper de- signed the integrated experiments of preparation and properties of CO2 （including density, non- combustion, and solubility of CO2 and reaction with lime water）. The apparatus were small and easy for students to operate in groups, which encouraged students to participate in the experimen- tal activities. Meanwhile, the way and strategies of thinking derived from these experiments pro- vided reference for other experiments.