化学是一门以实验为基础的学科,化学课堂教学离不开化学实验,现行教材中的某些实验虽使用多年,但由于缺乏实验的设计创意,在某些方面存在明显的不足。如何设计好化学实验,使课上得精彩,体现加深理解、抓住重点、突破难点的功能,并能培养各种能力,是摆在每一位化学教师面前的课题,现对其中三个实验进行设计改进。一、苏教版必修1中关于Fe~(2+)与Fe~(3+)之间的相互转化实验室提供试剂:铁粉、0.1mol/L FeCl_3溶液、0.1 Chemistry is an experiment-based discipline. Chemistry class teaching can not be separated from chemical experiment. Although some experiments in the current teaching materials have been used for many years, there are obvious deficiencies in some aspects due to the lack of experimental design ideas. How to design a good chemistry experiment so that the lesson can be wonderful, which shows the function of deepening comprehension, grasping the key point and breaking the difficult point and cultivating various abilities, is a topic for every chemistry teacher. Now, of the three experiments Design improvements. A, Sujiao edition compulsory 1 on Fe ~ (2+) and Fe ~ (3+) interconversion laboratory to provide reagents: iron, 0.1mol / L FeCl_3 solution, 0.1