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化学是一门以实验为基础的科学。做好化学实验,无疑将对化学教学起很大的促进作用。但现行中学化学课本所编排的诸多实验(包括演示实验和学生实验)中,对各种试剂的用量和浓度多未作明确规定,使得许多实验在使用试剂方面处于盲目之中,或则浪费试剂,或则不能达到预期的实验效果,有的甚至实验失败。而准确地掌握化学实验的用药量既能节省时间,得到满意的实验效果,提高教学质量,又可节约药品,防
Chemistry is an experiment-based science. Doing chemistry experiments will undoubtedly play a great role in promoting chemistry teaching. However, many experiments (including demo experiments and student experiments) in the current high school chemistry textbooks do not clearly specify the amount and concentration of various reagents, making many experiments blind in the use of reagents or wasting reagents. , Or you can not achieve the desired experimental results, and some even failed the experiment. Accurately mastering the dosage of chemical experiments can save time, obtain satisfactory experimental results, improve teaching quality, and save drugs.