学案“综合实验的分析和表述”学案长沙市长郡中学高三备课组喻建军一、导入《沁园春·化学》二、抽提核心词句原理原型,逻辑表述,实验高分尽可成三、体会真题(2016新课标Ⅱ卷,28)某班同学用如下实验探究Fe~(2+)、Fe~(3+)的性质。回答下列问题:(1)分别取一定量氯化铁、氯化亚铁固体,均配制成0.1mol/L的溶液,在FeCl_2溶液中需加入少量铁屑,其目的是______。 Case study “analysis and expression of comprehensive experiment” case Changsha Mayor Middle School Senior High School Preparation Class Yu Jianjun First, the introduction of “Patio spring chemistry” Second, extract the core principles of the prototype, logical expression, the experimental high score Into three, to understand Zhenti (2016 New Curriculum Volume II, 28) a class of students to explore the following experiments Fe ~ (2 +), Fe ~ (3 +) properties. Answer the following questions: (1) Take a certain amount of ferric chloride, ferrous chloride solid, are formulated into 0.1mol / L solution, the FeCl_2 solution to be added to a small amount of iron filings, the purpose is ______.