基于问题导向学习法的分析化学实验与理论知识融合的教学改革——以“水硬度的测定”为例

doi:10.3866/PKU.DXHX202301003

Abstract

Abstract:

An analytical chemistry experimental course should include theoretical, practical, and applicable properties, which mainly trains students to standardize operations and cultivates their ability to apply theoretical knowledge of analytical chemistry to address practical problems. Currently, a serious disconnect between experimental and theoretical knowledge exists as students are used to "taking prescriptions as prescribed". This study applies a problem-based learning method to the experimental teaching of analytical chemistry. To promote effective integration between experimental and theoretical teaching, teaching reform was performed by improving teaching mode, perfecting course content, and optimizing examination methods. This can completely mobilize students' learning autonomy and cultivate their abilities to observe, think, analyze, and solve problems. In this manner, the teaching effect of the experimental course was effectively improved.

Key words: Problem-based learning method, Experimental teaching of analytical chemistry, Teaching reform

Zhen Wu, Huaixia Chen. Teaching Reform of Analytical Chemistry Experiment and Theoretical Knowledge Integration Based on Problem-Based Learning: A Case Study of "Determination of Water Hardness"[J].University Chemistry, 2023, 38(10): 179-184.

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References 9

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布鲁姆认知教育目标	预习测试题
知道	EDTA与Ca²⁺的反应计量比为( ) A. 1 : 1 B. 1 : 2 C. 2 : 1 D. 无法确定
理解	测定总硬度时，酸度控制应该选择( ) A. 0.1 mol∙L⁻¹ HCl B. 0.1 mol∙L⁻¹ NaOH C. NH₃-NH₄Cl D. HAc-NaAc
应用	测定总硬度和钙硬度的指示剂分别是( )和( ) A. 铬黑T B. 二甲酚橙 C. 钙指示剂
分析	配位滴定时，为什么要加入缓冲溶液？
评估	三组平行实验数据的相对平均偏差大于0.2%，可能是什么原因？
创造	请查阅相关资料和文献说明测定水样中钙镁的含量还可以采用什么方法？并设计实验方案和实验步骤

实验学习前 (预习考核)占20%		实验学习中 (平时考核)占40%			实验学习后 (期末考核)占40%
预习题	预习报告	实验操作	实验结果	讨论	理论考试	操作设计
50%	50%	40%	40%	20%	60%	40%

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Teaching Reform of Analytical Chemistry Experiment and Theoretical Knowledge Integration Based on Problem-Based Learning: A Case Study of "Determination of Water Hardness"

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