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一、问题的提出义务教育九年级化学教材~([1])中O_2的性质实验,是先通过发生装置将O_2收集在多个集气瓶中(用毛玻璃片盖上),然后再进行其性质实验。教学中经常会因为提前制备的气体逸散而导致实验失败,教学目标难以落实。另外,教材中O_2发生和性质实验的装置比较繁琐,药品用量较大,实验用时较长。可见,设计一种能解决上述问题的装置尤为重要。
First, the problem put forward Compulsory education ninth grade chemistry textbook ~ ([1]) O_2 nature of the experiment, is first through the generating device O_2 collected in a plurality of gas collection bottles (covered with frosted glass), and then its Nature experiment. Teaching often because of the gas prepared in advance to escape the experiment failed, teaching objectives difficult to implement. In addition, the teaching materials O_2 occurred and the nature of the experimental device is more cumbersome, a larger amount of drugs, the experimental time-consuming. Visible, the design of a device to solve the above problems is particularly important.