化学是一门以实验为基础的科学。化学实验有着不同于其他学科实验的特点:一是化学实验仪器使用方法和操作步骤有严格的要求,操作者必须具有规范的操作技能。二是化学实验主要依靠宏观的化学现象来判断微观的化学反应的进行情况,由于各种原因,有的化学反应的伴生现象对主要现象干 Chemistry is an experiment-based science. Chemical experiments are different from the characteristics of other disciplines: First, the use of chemical laboratory equipment and procedures have strict requirements, the operator must have a standardized operating skills. Second, chemical experiments rely mainly on macroscopic chemical phenomena to judge the progress of the microscopic chemical reactions. For a variety of reasons, some of the chemical reactions that accompany the phenomenon of the main phenomenon of dry