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Set, Seng; Ford, David; Kita, Masakazu – Journal of Chemical Education, 2015
This research revealed that metal ions with different charges could significantly affect the viscosity of aqueous sodium carboxylmethylcellulose (CMC) solution. On the basis of an Ostwald viscometer, an improvised apparatus using a dropping ball for examining the viscosity of liquids/solutions has been developed. The results indicate that the…
Descriptors: Science Instruction, Molecular Structure, Metallurgy, Chemistry
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Rahayu, Sri; Treagust, David F.; Chandrasegaran, A. L.; Kita, Masakazu; Ibnu, Suhadi – Research in Science & Technological Education, 2011
Background and purpose: This study investigated Indonesian and Japanese senior high-school students' understanding of electrochemistry concepts. Sample: The questionnaire was administered to 244 Indonesian and 189 Japanese public senior high-school students. Design and methods: An 18-item multiple-choice questionnaire relating to five conceptual…
Descriptors: Chemistry, Concept Formation, Foreign Countries, Comparative Analysis