思考力・判断力・表現力等の育成を目指した高等学校化学実験―湯浴を用いたアルコールの脱水によるエーテルとアルケンの合成実験―

抄録

The synthesis of ethene and diethyl ether from ethanol is a typical experiment to familiarize students with the properties and reactivity of alcohols, ethers, and alkenes. Different products can be obtained by changing the reaction temperature (130 or 160˚C), which builds student’s interest in functional groups and organic synthesis. However, this reaction is somewhat unsuitable for students due to its high temperature conditions. In this study, we developed a more student-friendly experiment to synthesize ether and alkene from ethanol and 2-methyl-2-propanol at 90˚C using a water bath. This experiment includes determination of the reaction products based on the reaction conditions, and the properties and reactivity of products. Student notes and questionnaire results after the class practices indicate that this chemistry experiment is effective not only in developing students’ knowledge and skills, but also in fostering their ability to think, judge, and communicate.