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操作方法:如图安装仪器。加热,控制甲酸流量,产生 CO 气体。在空气中先点燃 CO 气体,然后开启空气(氧气更好)贮气瓶的进水活塞,将带玻璃尖嘴管的橡皮塞盖在 T 型管左端(注意尖嘴伸入的位置,如无适宜的 T 型管最好用具支试管截掉一部分后所剩部分代替)。燃烧完毕,盖上集气瓶塞振荡,石灰水变混浊。优点:1.用石灰水作燃烧前后对比,可加深学生对产物的理解。2.用本装置,尖嘴管进 CO,支管进氧气(空气),学生更能理解是 CO 与 O_2反应,加深记忆。3.生成的 CO_2用排空气集气法收集可达复习之目的。4.现象很明显,全班学生都可看到。
Operation method: Install the instrument as shown in the figure. Heating controls formic acid flow and produces CO gas. First ignite the CO gas in the air, then open the inlet piston for the air (oxygen better) cylinder, and cover the left end of the T-tube with a rubber tip with a glass tip pipe (note the position where the tip extends into, if not The appropriate T-tube is preferably replaced by a portion of the test tube that has been cut off. After the combustion is completed, the gas bottle stopper is closed and the lime water becomes cloudy. Advantages: 1. Using lime water for comparison before and after combustion can deepen students’ understanding of the product. 2. With this device, the tip of the needle into the CO, the branch into the oxygen (air), the students can better understand the reaction of CO and O_2, deepen the memory. 3. The generated CO_2 is collected using the air collection method for the purpose of review and review. 4. The phenomenon is very obvious to all students in the class.