【引言】作为人体必需的微量元素和最常见的变价金属,铁在生命领域、现代社会均发挥着尤为重要的作用.苏教版必修教材化学1专题三第二单元《铁、铜及其化合物的应用》以铁离子、亚铁离子的性质及相互转化为主要内容,介绍了铁离子的检验,铁离子、亚铁离子的性质与相互转化条件,不同价态的铁元素之间的相互转化在生产生活和科学研究中的广泛应用.从教材表面看,对学生的知识、能量要求并不高,但这部分 【Introduction】 As the human body essential trace elements and the most common variable-price metals, iron in the field of life, modern society is playing a particularly important role.Sujiao edition compulsory teaching chemistry 1 topic three second unit "iron, copper and its compounds The application of iron ions, ferrous ions and the nature of mutual transformation as the main content, introduced the test of iron ions, ferric ions, ferrous ions of the nature and mutual conversion conditions, different valences of the transformation between the iron In the production of life and scientific research in a wide range of applications from the teaching material surface, the knowledge of students, energy requirements are not high, but this part