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(一)一氧化碳还原氧化铜实验中所用的反应管,可用硬质玻管,两头都用橡皮塞代替。(二)教材中制取二氧化碳的装置,不便控制二氧化碳的产生量,我们打算改用启普发生器或如图所示的装置。(三)木炭还原氧化铜实验,用酒精喷灯加热,反应很快,2-3分钟后即可观察到明显的现象。实验时应注意,①实验中木炭用量一般相当于氧化铜重量的1/5-1/4,远远超过理论所需量;②反应前,需将氧化铜与木炭粉混和均匀,药品颗粒都要很细,
(A) of the reaction tube used in the experiment of carbon monoxide reduction of copper oxide, hard glass tube can be used, both ends replaced with rubber plugs. (II) The device for preparing carbon dioxide in the teaching materials is inconvenient to control the amount of carbon dioxide generated. We intend to switch to the QIP generator or the device as shown in the figure. (C) reduction of copper oxide test of charcoal, with alcohol torch heating, the reaction quickly, after 2-3 minutes to observe the obvious phenomenon. The experiment should be noted that ① the amount of charcoal used in the experiment is generally equivalent to 1 / 5-1 / 4 of the weight of copper oxide, far exceeding the theoretical amount required; ② before the reaction, copper oxide and charcoal powder should be mixed evenly, drug particles are To be very fine