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Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/10434

Title: 開發普通化學實驗課程的消費者化學實驗並評估其可行性
Development of Consumer Chemistry Experiments in General Chemistry Laboratory Course and the Evaluation for its Feasibility
Authors: 楊水平
Contributors: 化學系
Keywords: 制酸劑;消費者化學;錯合滴定法;錯合逆滴定法;定量分析;普通化學實驗和化學教育研究
Antacids;Consumer Chemistry;Complexometric Titration;Complexometric back Titration;Quantitative Analysis;General Chemistry Laboratory and Chemical Education Research
Date: 2003
Issue Date: 2012-05-23T02:28:42Z
Publisher: 行政院國家科學委員會
Abstract: 普通化學實驗的藥品大多數取自於化學藥品公司,鮮少利用消費者產品。這個缺點是實
Chemicals required for chemistry laboratory are mostly obtained from chemical companies.
Few chemical experiments use reagents from commercial sources. Nowadays, students’ interest in
chemistry is usually suffered from the lack of relevance of chemistry lectures and laboratories to
their daily lives, which ultimately lead to students’insufficient abilities in chemical problem
solving. This article presents a newly designed experiment for the determinations of metallic ions in
commercial antacids using uncommon titrations, suitable for general chemistry laboratory and
introductory quantitative analysis laboratory curriculums.
This experiment involves three new protocols designed for the determination of aluminum and
magnesium contents in commercial antacids by complexometric titration and back titration. This
newly developed experiment is very different from the quantitative analysis of acid-neutralizing
power of anions in antacids described in textbooks. In the experiment, students can learn various
concepts and techniques of sample preparation, complexometric titration and its back titration,
metallic indicators, uses of buffer solution, complex formations, masking, and blocking.
Results indicate three protocols are no significant difference in average and precision by
different analysts between students and instructor. Besides, results show there are no significant
difference in average and precision of different protocols between experiment and calculation
performed by instructor, and results point out the same as by students. These results verify the
feasibility of three protocols. In general, student comments on the experiment designs are highly
Relation: 國科會計畫, 計畫編號: NSC92-2511-S018-010; 研究期間: 9208-9307
Appears in Collections:[化學系] 國科會計畫

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