Wen-Bo Pei, , , Jian-Lan Liu*, , , Jiansheng Wu*, , , Fun Man Fung*, , and , Xiao-Ming Ren,
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引用次数: 0
Abstract
The determination of the rate constant for ethyl acetate saponification using a conductometric method is a classic experiment in undergraduate physicochemical laboratory courses. However, traditional methods often yield unsatisfactory accuracy. We introduce an improved experimental setup featuring a novel reaction vessel with magnetic stirring and precise temperature control. Additionally, an optimized procedure incorporates direct injection of pure ethyl acetate and data recording via smartphone videos, simplifying the process for students. This enhanced experiment delivers highly accurate results across six temperatures with relative errors for the rate constant and average activation energy below 2.00%. Reliability and repeatability tests in a standard classroom setting confirm superior performance, making this method ideal for widespread adoption in physicochemical laboratory curricula.
期刊介绍：
The Journal of Chemical Education is the official journal of the Division of Chemical Education of the American Chemical Society, co-published with the American Chemical Society Publications Division. Launched in 1924, the Journal of Chemical Education is the world’s premier chemical education journal. The Journal publishes peer-reviewed articles and related information as a resource to those in the field of chemical education and to those institutions that serve them. JCE typically addresses chemical content, activities, laboratory experiments, instructional methods, and pedagogies. The Journal serves as a means of communication among people across the world who are interested in the teaching and learning of chemistry. This includes instructors of chemistry from middle school through graduate school, professional staff who support these teaching activities, as well as some scientists in commerce, industry, and government.
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