Abstract The project focuses on the two social life situations of “inspection and extraction of iodine from kelp” and “extraction of mannitol”. Through four groups of tasks, including the production of flowcharts, the discussion of process problems, the specific operations of experiments, and the after-class expansion research, to complete the review of the chapter on “dissolution phenomenon”, construct a thinking model of cognitive industrial process, understand the concepts of “dissolution, solution, solubility, crystallization” and other discipline concepts, infiltrate the concepts of element view, particle view, balance view, etc., and develop core literacy in designing inquiry experiments, data analysis and evidence reasoning.
ZHAN Fa-Yun. Project Teaching of “Dissolution Phenomenon” in Junior High School Chemistry: Extraction of Iodine and Mannitol from Kelp[J]. Chinese Journal of Chemical Education, 2021, 42(7): 37-42.