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KMID : 1059520080520010073
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Journal of the Korean Chemical Society
2008 Volume.52 No. 1 p.73 ~ p.83
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A Study of High School Students’ Conceptions of Mixing Phenomena Related to Dissolution and Diffusion
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Hur Mi-Youn
Jeon Hey-Sook
Paik Seoung-Hey
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Abstract
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The purpose of this study was to investigate the types of conceptions of mixing phenomena related to dissolution and diffusion in high school students. The subjects of the investigation consisted of 108 students who took chemistry I course at 11th grade and 29 students who took chemistry II course at 12th grade. For this study, it was found that the many students had the alternative conception that chalk didn’t dissolve in water because chalk was a nonpolar material. Most of the students understood the phenomena which carbon tetrachloride and water will not mix as the attraction conception. But many of the other students understood the phenomenon as characteristic of the materials such as difference of density. Many of the students understood the phenomenon of mixing ethanol and water constantly as ‘Attraction conception’. The phenomenon which is mixed ink and water was just accepted by the most students as the spreading of ink in water without understanding the reason of mixing. The phenomena of mixing iodine and carbon tetrachloride was understood as ‘Space conception’ or ‘Attraction conception’. It could be inferred that the diverse alternative conceptions related to dissolution and diffusion phenomena were generated by the absence of entropy concept. Therefore, the explanations of science textbooks related to dissolution and diffusion phenomena need to change for students to understand them correctly.
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KEYWORD
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High School Student, Mixing Phenomena, Dissolution, Diffusion, Attraction Conception, Science Textbook, Entropy
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