Understanding and Improvement of an Experiment Measuring Chemical Reaction Rates by Monitoring Volume Change of a Gas:On the Reaction between HCl(aq) and Mg(s) 


Vol. 50,  No. 5, pp. 404-0, Oct.  2006
10.5012/jkcs.2006.50.5.404


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  Abstract

본 연구에서는 고등학교 과학 교과서에 제시된 화학반응속도 측정을 위한 실험을 수행할 때 관찰되는 현상을 이해함으로써 교과서 실험의 문제점과 그 원인을 분석하여 개선 방안을 제시하였다. 이를 위하여 화학반응속도 측정과 관련된 단원의 교과서 내용을 분석하였으며, 실험을 수행할 때 발견되는 문제점을 실험분석을 통해 제시하였다. 교과서에 제시된 수상치환법으로 실험을 하였을 때 부피 변화가 지연되어 관찰되는 현상과 반응속도가 초기에 증가하는 현상이 관찰되었다. 이러한 문제를 해결하기 위한 개선된 실험 방법을 제안하였다. 개선된 실험에서 반응속도는 시간에 대해 일정하게 측정되었고, 그 결과를 수소이온 농도와 마그네슘 리본의 표면적의 관점에서 해석하였다. In this study we analyzed and improved an experiment measuring chemical reaction rates introduced in the high school science textbooks through an understanding of the phenomena observed in carrying out the experiment. For this purpose, the contents of textbooks related to the experiment were analyzed, and the problems observed in carrying out the experiment were addressed through experimental analysis. When the experiment was carried out by the method of aquatic transposition presented in textbooks, the observed volume change of 2 gas was delayed and chemical reaction rate was increased in the early stage of reaction period. To resolve these problems, an improved method for measuring the reaction rates was suggested. In the improved experiment the reaction rate was measured to be constant on time, which was interpreted in terms of the concentration of H+ and the surface area of magnesium.

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  Cite this article

[IEEE Style]

J. Bang, H. Yoon, W. Choi, D. H. Jeong, "Understanding and Improvement of an Experiment Measuring Chemical Reaction Rates by Monitoring Volume Change of a Gas:On the Reaction between HCl(aq) and Mg(s)," Journal of the Korean Chemical Society, vol. 50, no. 5, pp. 404-0, 2006. DOI: 10.5012/jkcs.2006.50.5.404.

[ACM Style]

Jeong-Ah Bang, Heesook Yoon, Wonho Choi, and Dae Hong Jeong. 2006. Understanding and Improvement of an Experiment Measuring Chemical Reaction Rates by Monitoring Volume Change of a Gas:On the Reaction between HCl(aq) and Mg(s). Journal of the Korean Chemical Society, 50, 5, (2006), 404-0. DOI: 10.5012/jkcs.2006.50.5.404.

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