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Battino, Rubin; Letcher, Trevor M. – Journal of Chemical Education, 2008
The cryophorus dramatically demonstrates the cooling effect of evaporation. This article describes some simple and easy-to-make cryophoruses, ideal for demonstrating evaporative cooling to students at all levels. The most dramatic effects occurred with cyclohexane and benzene, with water generally freezing more slowly. (Contains 4 notes, 2 tables,…
Descriptors: Science Experiments, Water, Scientific Concepts, Science Laboratories
Seng, Set; Kita, Masakazu; Sugihara, Reiko – Journal of Chemical Education, 2007
The use of harmful organic solvents in classrooms has become a critical issue of concern in the field of chemistry education. This article describes a classroom activity at a high school in which an acrylic fabric was used as the extraction medium in the analysis of the detergent concentration in water instead of organic solvents. Dyes were used…
Descriptors: Chemistry, High School Students, Secondary School Science, Class Activities
Agbeko, Julius Kofi; Kita, Masakazu – Journal of Chemical Education, 2007
This article describes a novel, hands-on method to qualitatively determine the extent of microbial activity in topsoil using ordinary blank paper. Appropriate and scalable for the high school and college level, these experiments expose students to some of the challenges facing environmental researchers and also contribute to curriculum development…
Descriptors: Environmental Education, Secondary School Science, College Science, College Students