人教版《自然》第十册氧气的教学中需要制取氧气,如果按照教材中介绍的方法来收集气体,既不方便,又容易发生事故。因为倒置在水槽中的集气瓶容易翻倒,所以必须始终用手把持。导气管伸入水槽内,如果稍有疏忽,先撤酒精灯,就会使水槽中的水倒吸进灼热的试管内,试管炸裂,发生事故,为此,我自制了一个钟罩式储气瓶。 People's Education Edition “Nature” Tenth Oxygen teaching needs oxygen, according to the methods described in the textbook to collect gas, neither convenient, but also prone to accidents. Because the gas tank that is inverted in the sink tends to tip over, it must always be held by hand. Airway into the sink, if slightly negligent, the first withdrawal of alcohol lamp, it will make sink water poured into the burning test tube, test tube burst, accident, for which I made a bell-type gas bottle.