滴定实验台与设计性实验教学应用探索

Exploration on Application of Titration Apparatus and Teaching of Designing Experiment

提出将试验台设计理念融合到实验过程中。通过方案设计,学生对4种滴定方法有了更全面的掌握。采用电位滴定法分析Na 2CO 3和Na 2SO 3混合溶液,对Na 2CO 3的平均测量误差小于4%。设计性实验在锻炼学生设计能力,促进知识结构体系化,激发学习热情和提高学生的语言表达能力方面起到促进作用。

Students’ ability to analyze and solve problems can be developed through researching and designing experiments. The concept of integrating the design of apparatus into the experimental process was proposed. Through conceptual design,students have a more comprehensive understanding of the practice of four titration methods. The potentiometric titration method was adopted to analyze the mixed solutions of Na 2CO 3 and Na 2SO 3,and the average measurement error of Na 2CO 3 was less than 4%. The practice of designing experiments plays an important role in training students’ design ability,promotes the systemization of knowledge structure,stimulates enthusiasm for learning and improves students’ language using skills.