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化学是学生初三才接触的学科,这门学科有一个很大的特点:实验特别多,很多结论都是通过实验得到的.因而做好实验是学好这门课的基础.但是在做实验过程中,学生在做实验时却出现了不同的现象,这称之为异常现象,异常现象在实验中比较常见.总的来说,化学实验中的异常现象可以分为两类:因操作不当产生的和非因操作不当产生的.一、因操作不当而产生的异常现象1.在给试管中的液体加热后,发现试管破裂了.根据试管的
Chemistry is a discipline that students only come into contact with in the third year. This subject has a very big feature: there are many experiments, and many conclusions are obtained through experiments. Therefore, doing experiments is the basis for learning this course well. But during the experiment Students have different phenomena when they do experiments. This is called an anomaly. Abnormal phenomena are common in experiments. In general, abnormal phenomena in chemical experiments can be divided into two types: due to improper operation. And not due to improper operation. I. Abnormal phenomenon due to improper operation 1. After heating the liquid in the test tube, the test tube was found to have ruptured.