化学实验具有一定的危险性,安全实验的关键是要按照操作规定进行实验,危险也能变为安全。反之,安全也变得不安全。但也不要害怕,也不必满腹恐惧不敢动手实验。实验时要熟悉操作规定,了解反应规律,不懂要问,不可蛮干。否则,在实验过程中一旦发生事故,危及师生的安全,甚至严重致残造成终生不幸,同时会影响学生学习化学的兴趣,事关重大,务必高度警惕。请注意下列情况下常常会发生实验事故: Chemical experiments have a certain degree of danger. The key to safety experiments is that experiments should be conducted in accordance with operational regulations and danger can become safe. Conversely, security also becomes unsafe. But do not be afraid, do not have to fear full of fear experiment. Experiments to be familiar with the rules of operation, understand the law of reaction, do not know to ask, not foolhardy. Otherwise, once an accident occurs during the experiment, endangering the safety of teachers and students, or even causing severe disability, causing unfortunate life-long, and will affect students' interest in learning chemistry, it is of great importance and must be highly vigilant. Please note that there are often experimental accidents in the following situations: