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一、根据实验目的,设计实验方案例1请按要求设计实验方案：(1)如何利用水和常见化学仪器采集菜窖中的空气?(2)如何采集膨化食品袋中的气体?解析：(1)由排水集气法收集氧气,联想到把装满水的集气瓶拿到菜窖中,然后倒掉水即可收集到里面的空气．(2)由于膨他食品袋是密封的,因此我们在采集对使用实验室的常用仪器显然是无法完成的,联想到我们生病打针使用的注射器,我们可用它采集气体．
First, according to the purpose of the experiment, the design of experimental program Example 1 according to the requirements of the design of experimental programs: (1) how to use water and common chemical equipment to collect the air in the cellar? (2) how to collect puffed food bag gas? 1) The collection of oxygen by the drainage collection method, think of the collection of water bottles into the cellar, and then pour the water to collect the air inside. (2) Since the expanded food bag is hermetically sealed, it is obviously impossible for us to collect the commonly used instruments for laboratory use, and to think of the syringes we use for sick injections, we can use it to collect the gas.