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학술발표회초록보기

초록문의 abstract@kcsnet.or.kr

결제문의 member@kcsnet.or.kr

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  • 03월 02일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제109회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Analysis of the Cause of Students` Misunderstanding About the Law of Definite Proportions Experiment and Improving the Experimental Equipment by Measuring the Mass

등록일
2012년 2월 15일 21시 46분 52초
접수번호
0638
발표코드
EDEC.P-1316 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
4월 25일 (수요일) 18:00~21:00
발표형식
포스터
발표분야
초중등교사ㆍ화학교육
저자 및
공동저자
김순근
경기과학고등학교 화학생명과학부, Korea
In the 7th national science curriculum of 9th grade, we generate lead iodide to explain the law of definite proportions. However, most of high school students were not able to understand the law by using current method. Thus, we tried to identify why students couldn't understand it properly by an experiment, and concerned about new method to understand the law by an experiment. Following the reference, we observed the change which might occur when potassium iodide aqueous solution is added into lead nitrate aqueous solution. As excess lead potassium iodide solution was added in to lead nitrate aqueous solution, the state of the deposit in the solution has been changed. Also, we tried to make a new experimental equipment which can measure a mass of deposit rather than a volume of that. The mass of the deposit was measured accurately by using 0.2㎛ syringe filter and 10mL syringe. By this research, we learned why students was not able to understand the law, and, because it is possible to explain the law of definite proportions by the concept of the mass, students could understand it more easily and accurately.

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