Buffers in Context: Baby Wipes As a Buffer System,Journal of Chemical Education

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Buffers in Context: Baby Wipes As a Buffer System
Journal of Chemical Education ( IF 2.5 ) Pub Date : 2018-08-17 00:00:00 , DOI: 10.1021/acs.jchemed.8b00378
Jon-Marc G. Rodriguez ₁ , Sarah Hensiek ₁ , Jeanne R. Meyer ₁ , Cynthia J. Harwood ₁ , Marcy H. Towns ₁

Affiliation

An understanding of buffers is important in a variety of chemistry subdisciplines, with relevant applications to the life sciences and health profession-related fields. Here, we describe the development and implementation of a lab that involves creating a buffer solution using baby wipes and deionized water. The goal of this lab was to emphasize a conceptual understanding of buffers within a context that would be interesting and relevant for students in a nonmajors general chemistry course, a population composed primarily of health/human science and agricultural science majors. The prelaboratory assignment and postlaboratory discussion focus on modeling by making connections between laboratory observations and the particulate-level view of a buffer. Overall, the experiment seeks to prompt students to think beyond the macroscopic view that buffers resist changes in pH and guide students toward thinking mechanistically about how a buffer resists changes in pH, a process that depends largely on the buffer components and their respective amounts.

中文翻译：

上下文中的缓冲区：婴儿擦拭作为缓冲区系统

对缓冲剂的理解在各种化学子学科中都很重要，并且在生命科学和卫生专业相关领域中也有相关应用。在这里，我们描述了实验室的开发和实施，该实验室涉及使用婴儿湿巾和去离子水创建缓冲溶液。该实验室的目的是强调对非专业通用化学课程（主要由健康/人文科学和农业科学专业组成的人群）中的学生感兴趣且相关的背景下对缓冲液的概念性理解。实验前的分配和实验后的讨论着重于通过在实验室观察结果和缓冲液的颗粒级视图之间建立联系来进行建模。全面的，缓冲液如何抵抗pH的变化，这一过程很大程度上取决于缓冲液的成分及其各自的含量。

更新日期：2018-08-17

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