以制备氢氧化亚铁创新实验撬动学生的创新思维

Leveraging Students’ Innovative Thinking Through Innovative Preparation of Fe(OH)_2

针对制备氢氧化亚铁实验很难观察到白色沉淀的问题,课堂上采用学生自主创新的方式,亲自体验基于文献资料创新设计实验→实验验证→最终获得成功实验方案的全过程。所得创新实验方案为:取一根打磨光亮的粗铁丝于试管中,加入6 mol/L稀硫酸,待气泡不明显后,向其中加入40%氢氧化钠溶液。该方案简单易操作、现象明显,适合学生分组实验,同时实验过程中产生的意外现象激发了学生深度思考,发展学生的实验探究能力。实验的创新设计过程以及意外现象的分析解决过程,撬动了学生的创新思维。

In response to the difficulty in observing white precipitates in the preparation of Fe(OH)_2 experiments, students were encouraged to independently innovate in the classroom and personally experience the entire process of designing experiments based on literature, verifying experiments, and ultimately obtaining a successful experimental plan. The innovative experimental plan obtained is to take a coarse iron wire into a test tube, add 6 mol/L dilute sulfuric acid, and add 40% NaOH solution to it after the bubbles are not obvious. This plan is simple, easy to operate, and has obvious phenomena, making it suitable for students to conduct group experiments. At the same time, unexpected phenomena generated during the experimental process stimulate students' deep thinking and develop their experimental exploration ability. The innovative design process of the experiment and the analysis and solution process of unexpected phenomena have stimulated students' innovative thinking.