“宏-微-符”三重表征法在中学化学实验教学中的应用--以“Fe^(2+)与Fe^(3+)的检验”为例

The Application of the“Macro-Micro-Symbol”Triple Representation Method in Middle School Chemistry Experiment Teaching——Taking the“Test of Fe^(2+)and Fe^(3+)”as an Example

以中学化学课堂实验教学“Fe^(2+)与Fe^(3+)的检验”为例,引导学生先从宏观上观察实验现象,再从微观角度解释实验现象,最后从化学特有的语言—书写“离子反应方程式”进行符号表征。这种“宏-微-符”三重表征法有利于学生学习化学知识和构建三者内在的联系,并培养形成学生化学实验探究学习的特定思维模型。

This article takes the classroom experimental teaching of the“test of Fe^(2+)and Fe^(3+)”as an example to guide students to observe experimental phenomena from a macro perspective,explain experimental phenomena from a micro perspective,and finally use the unique language of chemistry writing“ion reaction equations”for symbol representation.This“macro-micro-symbol”triple representation method is conducive to the students chemical knowledge study and the construction of the three inherent links,and has become a unique thinking model for chemistry learning,especially experimental inquiry learning.