本文是利用对苹果中铁元素存在与否以及存在性质的探究,作为铁元素学习的补充,是对三价铁离子和二价铁离子的相互转换知识的再认识,提高学生学习化学的兴趣.苹果是日常生活中常见的水果,削皮后长时间摆放会变成褐色,有的时候我们会说苹果“生锈”了.生锈,会让人联想到铁元素的存在,因为褐变的颜色类似于铁生锈的颜色.那么苹果中是不是含有铁元素,并且这些铁元素是以什么样的状态存在的,苹果的 This article is the use of apple in the presence of iron and the existence and nature of the inquiry, as a supplement to the study of iron, ferric iron and ferrous ions is the mutual knowledge of the conversion of knowledge to enhance students interest in learning chemistry. Is a common fruit in everyday life, peeled into a long time will become brown, sometimes we will say Apple “rust ” rusty, reminiscent of the presence of iron, because brown The color of the iron is similar to the color of iron rust.And then the apple contains iron, and these iron elements is what kind of state exists, the apple