수소 발생 실험의 개선에 관한 연구

Abstract

The purpose of this study is to improve the experiment of dihydrogen production which was newly added to the 7thasked about the difficulties they ever had in the dihydrogen production experiment by questionnaire. And the contentsof the science textbook and teachers' guide book were analyzed. According to this investigation, the folowing con-troversial points were found. First, they didn't have exact explanations about the concentration of hydrochloric acidand the quantity of hydrochloric acid and magnesium in the science textbok and teachers' guide bok. Second, theexperiment which can show wel the nature of dihydrogen was not included because of the safety problem. So thispaper presents the ideal condition for the production of dihydrogen and an experimental method to show the natureof dihydrogen. The most ideal condition of dihydrogen production includes 40 mL of 2 molarity hydrochloric acidand 1 g of magnesium. It took 5' 42'' on average to gather two bottles (250 mL) of dihydrogen. In this condition itdihydrogen explosion with a test tube and a film box which is not included in the 7th scince textbook. If teachersshow the experiment of dihydrogen explosion with a test tube or film box to students at a clas, it will be moreinteresting for students. And they will be able to help students to understand that dihydrogen can be gathered.