A Discovery Chemistry Experiment on Buffers
A Discovery Chemistry Experiment on Buffers
复制标题
缓冲液的发现化学实验
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
K. Mills
中科院分区：
文献类型：
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作者：
Suzanne E. Kulevich;R. Herrick;K. Mills
圣十字化学系设计并实施了一项关于缓冲液的实验，作为我们发现化学课程的一部分。发现化学的教学理念是使实验室成为学生在本科教学的前两年学习的重点。我们首先在实验前会议上提出问题，作为讨论的焦点，并指导实验室的调查。然后，我们用实验结果来指导课堂讨论和发现化学原理。在本实验中，学生首先使用三个缓冲区的汇总学生数据发现Henderson-Hasselbalch方程。学生还通过检查添加强酸，强碱或水对缓冲溶液pH值的影响来发现缓冲液的定性效果，而非缓冲溶液。使用他们的汇总结果和知识的滴定曲线发现在以前的实验室，学生获得定性和定量...
The Holy Cross Chemistry Department has designed and implemented an experiment on buffers as part of our Discovery Chemistry curriculum. The pedagogical philosophy of Discovery Chemistry is to make the laboratory the focal point of learning for students in their first two years of undergraduate instruction. We first pose questions in prelaboratory sessions that serve as the focus for discussion and that guide inquiry in the lab. We then use the experimental results to guide the lecture-hall discussion and discovery of chemical principles. In this experiment, students first discover the Henderson–Hasselbalch equation using pooled student data for three buffers. Students also discover the qualitative effects of buffers by examining the influence of the addition of a strong acid, a strong base, or water on the pH of a buffered solution versus that of nonbuffered solutions. Using their pooled results and knowledge of titration curves discovered in the previous lab, students gain a qualitative and quantitative...