基于STEM教学理念的分析化学实验教学新模式探索——以“自来水硬度测定”为例

doi:10.3866/PKU.DXHX202107120

Abstract

Abstract:

STEM is a type of educational concept based on multi-disciplinary integration of science, technology, engineering and mathematics, which has become a focus of international education research and reform. It aims to cultivate the students' ability of asking, analyzing and solving problems, and stimulate students' spirit of scientific exploration and innovative thinking by merging the multidisciplinary knowledge. In this paper, educational concept of STEM is introduced into the course of analytical chemistry experiment teaching, and a new teaching mode of analytical chemistry experiment course is explored. It is advocated to take students as the center and take real problems as the guide to cultivate students' scientific exploration and practice ability. Students can independently complete a series of analytical chemistry experiment via resorting relevant courses theory, experimental scheme design, experimental process and result analysis. A new teaching mode of analytical chemistry experiment is investigated from three aspects including course content, teaching methods and assessment methods, so as to improve the teaching quality of analytical chemistry experiments and students' learning interest and scientific literacy.

Key words: Analytical chemistry experiment, Educational concept of STEM, Scientific literacy, Creativity

Hongsheng Tang, Ting Feng, Tianlong Zhang, Yan Li, Hua Li. Exploration of New Teaching Mode of Analytical Chemistry Experiment Based on STEM Educational Concept: Taking "Measurement Hardness of Tap Water" as an Example[J].University Chemistry, 2022, 37(4): 2107120.

项目	内容
实验目的	(1) 学习络合滴定的原理及其应用；(2) 掌握EDTA标准溶液的配制、标定；(3) 掌握铬黑T指示剂的使用及终点判断；(4) 掌握络合滴定操作方法
解决的问题	如何通过滴定的方法准确测定自来水硬度
实验原理	测定水的钙镁总硬度时，在pH = 10的缓冲溶液中，以铬黑T (EBT)为指示剂，指示剂与钙、镁离子形成酒红色的络合物，滴定时指示剂被EDTA从络合物中取代出来，至终点即恢复指示剂本身的天蓝色；同时需要掩蔽Fe³⁺、Al³⁺、Cu²⁺、Pb²⁺、Zn²⁺等金属离子
相关知识点	水总硬度、钙硬度、镁硬度、暂时硬度、永久硬度、络合滴定、EDTA溶液、标准溶液的标定、铬黑T指示剂、掩蔽剂
实验方案	实验所需的仪器和试剂；设计实验内容，溶液的配制、标准溶液的标定、待测溶液的滴定、实验操作步骤、实验注意事项
实验要求	仪器操作规范、数据记录规范、数据处理要求、实验结果分析

1	吴明侠; 谢彩侠. 中国中医药现代远程教育, 2011, 9 (12), 54.
2	王秀云; 宿艳; 张永策; 潘玉珍. 大学化学, 2021, 36 (1), 2001032.
3	耿萍; 张帆. 大学化学, 2020, 35 (1), 12.
4	董宏建; 白敏. 现代教育技术, 2016, 26 (7), 12.

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Exploration of New Teaching Mode of Analytical Chemistry Experiment Based on STEM Educational Concept: Taking "Measurement Hardness of Tap Water" as an Example

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