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KMID : 1059520120560060731
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Journal of the Korean Chemical Society
2012 Volume.56 No. 6 p.731 ~ p.738
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Science High School Students’ Understandings on Chemical Cells : In Relation to Chemical Equilibrium from the Microscopic Viewpoint at Molecular Level
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Kim Hyun-Jung
Hong Hun-Gi
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Abstract
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The purpose of this study is to analyze the understandings of science high school students on the conception of chemical cell in relation to chemical equilibrium from the microscopic viewpoint at molecular level through questionnaires and follow-up interviews. The results show that they have high understandings on the chemical equilibrium states in the electrochemical cell and on the redox reaction taking place simultaneously when a metal electrode is immersed in the metal ion solution. However, they do not fully comprehend the development of electrical potential difference, electron movement, electrode potential measurement in the half-cells, and calculation of the net cell voltage between anode and cathode in the chemical cell because of difficulties in the microscopic understanding the interaction on the interface at the electrode and the electrolyte solution.
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KEYWORD
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Chemical cell, Electrochemical equilibrium, Chemical equilibrium, Microscopic viewpoint
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