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题名: How Thick is the Laminated Aluminum Foil of Flexible Food Packages and How Many Atomic Layers are There? Students` Quantitative Problem Solving through Complexometric Titration Experiments
作者: Yang, Shui-Ping;Li, Chung-Chia
贡献者: 化學系
关键词: Complexomeric Back Titration;Atomic Layer;Laboratory Instruction;Problem-Based Learning;Hands-On Learning;Chemometrics
日期: 2009
上传时间: 2012-05-23T03:03:03Z
出版者: The Society of Computer Chemistry
摘要: Chemistry-major freshmen often learn problem-solving skills in the classroom rather than in
the laboratory. The problems that are usually given by teachers or from textbooks are almost
virtual-situation rather than real-world. In this study, we provided our students with a
real-world problem on the thickness and the atomic layer of laminated aluminum foil. This
study includes four main facets: (i) Developing teaching materials; (ii) Describing strategies
of problems solving; (iii) Examining students’ problem solving; and (iv) Analyzing students’
learning feedback. This study concludes: (a) Teacher-developed experiments are suitable as
real-time teaching materials for students’ hands-on learning for general and analytical
chemistry laboratories; (b) In term of laminated aluminum foil using four flexible food
packages as samples determined by the teacher and students, the thicknesses range
0.000549-0.000652 cm (4.59-6.52 μm) and 0.000480-0.000688 cm (4.80-6.88 μm), as
well as show 27100-32200 and 22500-32600 atomic layers, respectively; (c) Student’s
learning feedback reveal that the overwhelming majority of students have positive responses
in cognitive domain, affective domain and science process skills.
關聯: Chemical Education Journal, 13(1)
显示于类别:[化學系] 期刊論文


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