Undergraduate students often find it difficult to understand the chemical principles underlying liquid–liquid extractions. Explanations on how extractions work at the molecular level in textbook and internet resources are plentiful, but students still do not seem able to grasp how extractions work before having to perform the technique in a laboratory course. To address student discomfort with conducting extractions, we developed an Extraction on Paper activity. We envision this activity as a tool to help students understand and apply the chemical principles underlying liquid–liquid extractions outside of and before entering into a laboratory setting.

中文翻译：

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纸上活动的提取：一种主动学习技术，可帮助学生理解液体提取

本科生通常很难理解液-液萃取的化学原理。在教科书和互联网资源中，关于提取如何在分子水平上起作用的解释很多，但是学生们似乎仍然无法掌握提取的工作原理，而必须在实验室课程中进行该技术的研究。为了解决进行提取时学生的不适感，我们开发了“纸上提取”活动。我们将此项活动设想为一种工具，以帮助学生理解并应用进入实验室设置之前和之后的液-液萃取基础化学原理。