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Science High School Students' Understandings on Chemical Cells : In Relation to Chemical Equilibrium from the Microscopic Viewpoint at Molecular Level

과학고등학교 학생의 화학 전지에 대한 이해 분석: 분자적 수준의 미시적 관점에서 화학 평형과 연계하여

  • Received : 2011.11.10
  • Accepted : 2012.09.14
  • Published : 2012.12.20

Abstract

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.

Keywords

Chemical cell;Electrochemical equilibrium;Chemical equilibrium;Microscopic viewpoint

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