集成指令和溶剂极性指示器：降低首次蒸馏的复杂性

IF 2.5 3区教育学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of Chemical Education Pub Date : 2024-09-09 DOI:10.1021/acs.jchemed.4c00466

Patrick I. T. Thomson, Deborah Cleary

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引用次数: 0

摘要

实践作业具有很高的认知负荷，尤其是在首次引入不熟悉或复杂的设备时。以前，"综合指示 "曾被用于减轻中学教育实践作业中的认知负荷，它将指示放在图表中，减少了整合不同信息源的需要。在这里，我们将这种方法用于本科生水平的蒸馏实验，以集中注意力，减轻认知负荷，并为轻度 "探究要素 "学习留出空间。使用溶解变色染料作为极性指示剂还为蒸馏增加了一个不同寻常的视觉方面，使学生能够轻松地估计或验证分数的组成。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Integrated Instructions and Solvent Polarity Indicators: Reducing the Complexity of First-Time Distillation

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Integrated Instructions and Solvent Polarity Indicators: Reducing the Complexity of First-Time Distillation

Practical work carries a high cognitive load, particularly when unfamiliar or complex equipment is first introduced. “Integrated Instructions” have been previously used to reduce cognitive load in secondary education practical work by placing instructions within diagrams, reducing the need to integrate disparate sources of information. Here, we use this approach in an undergraduate-level distillation experiment to focus attention, reduce cognitive load, and make space for light “elements of inquiry” learning. The use of a solvatochromic dye as a polarity indicator also adds an unusual visual aspect to distillation, allowing students to easily estimate or verify the composition of fractions.

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来源期刊

Journal of Chemical Education 化学-化学综合

CiteScore

5.60

自引率

50.00%

发文量

465

审稿时长

6.5 months

期刊介绍： The Journal of Chemical Education is the official journal of the Division of Chemical Education of the American Chemical Society, co-published with the American Chemical Society Publications Division. Launched in 1924, the Journal of Chemical Education is the world’s premier chemical education journal. The Journal publishes peer-reviewed articles and related information as a resource to those in the field of chemical education and to those institutions that serve them. JCE typically addresses chemical content, activities, laboratory experiments, instructional methods, and pedagogies. The Journal serves as a means of communication among people across the world who are interested in the teaching and learning of chemistry. This includes instructors of chemistry from middle school through graduate school, professional staff who support these teaching activities, as well as some scientists in commerce, industry, and government.