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Analysis of Precipitate Formation Reaction for Measuring Chemical Reaction Rate and Its Development Appling Small-Scale Chemistry
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앙금 생성 반응을 이용한 화학반응속도 측정 실험의 분석과 Small-Scale Chemistry를 적용한 실험 개발

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Type
Academic journal
Author
Journal
대한화학회 Journal of the Korean Chemical Society Vol.52 No.3 KCI Accredited Journals SCOPUS
Published
2008.6
Pages
303 - 314 (12page)

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Analysis of Precipitate Formation Reaction for Measuring Chemical Reaction Rate and Its Development Appling Small-Scale Chemistry
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The purpose of this study was to understand the experiment for measuring chemical reaction rate by precipitate formation and to develop experiments applying small-scale chemistry. For this study, the experimental method for measuring the effect of concentration and temperature on chemical reaction rates presented in the 10 high school science textbooks were classified by their experimental methods of confirming production. Subsequently, problems observed in carrying out the experiments for measuring chemical reaction rates by precipitate formation frequently presented in the 10 high school science textbooks were analyzed. Experiments applying small-scale chemistry were developed measuring chemical reaction rate by precipitate formation. According to the result of this study, there were some problems in the experimental method of precipitate formation for measuring chemical reaction rates presented in the high school science textbooks. Those problems in the science textbook experiments were insufficient specification of mixing methods of reaction solutions, obscurity of knowing when the character letter X disappeared, time delay in collecting the experimental data, formation of hazardous sulfur dioxide, uneasiness of fixing water bath container, controlling the reaction temperature, and low reproducibility. Those problems were solved by developing experiments applying smallscale chemistry. Presenting the procedure of mixing reaction solutions on the A4 reaction paper sheet made the experimental procedure clearly, using well plates and stem pipette shortened the reaction time and made it possible to continuously collect the experimental data. Furthermore, the quantity of hazardous sulfur dioxide was reduced 1/7 times and the time when the character letter X disappeared could be observed clearly. Since experiments for measuring the effect of concentration and temperature on chemical reaction rates could be performed in 30 minutes, the developing experiments applying SSC would help students understand the scientific concepts on the effect of concentration and temperature on chemical reaction rates with enough time for experimental data analysis and discussion.
#고등학교 과학 교과서 # 실험 개 # 앙금 생성 반응 # 화학반응속도 측정 # 화학반응속도에 미치는 농도와 온도의 영향 # Effect of Concentration and Temperature on Chemical Reaction R # High School Science Textbooks # Measuring Chemical Reaction Rates #Small-scale chemistry (SSC) #Small-Scale Chemistry (SSC)

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