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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; Chandrasegaran, A. L.; Treagust, David F.; Kita, Masakazu; Ibnu, Suhadi – International Journal of Science and Mathematics Education, 2011
This study was a mixed quantitative-qualitative research to evaluate the efficacy of a designed student-centred instructional (DSCI) program for teaching about acids and bases. The teaching innovation was designed based on constructivist, hands-on inquiry and context-based approaches and implemented in seven 45-min lessons with a class of 36 grade…
Descriptors: Constructivism (Learning), Experimental Groups, High Schools, Qualitative Research