“铁的化合物”是高中化学第二册第三章《铁》的重点内容，要使学生能较好地掌握这一节内容，做好演示实验是非常重要的，为了让全班学生都能清楚地看到各实验的颜色变化，我在教学中作了如下改进：实验一氢氧化亚铁转化为氢氧化铁1．实验主要仪器①培养皿（中间用蜡烛分隔成两 “Iron compound” is the key content of the third chapter “Iron” in the second volume of High School Chemistry. It is very important for students to be able to master the content of this section. It is very important to do a demonstration experiment so that all students in the class can Clearly see the color change of each experiment, I made the following improvements in the teaching: Experiment 1 Ferrous hydrate into iron hydroxide 1. The main instrument of experiment 1 Petri dish (the middle is separated into two candles