Abstract This paper elaborated the principle of crystallization (recrystallization) and analyzed the teaching requirements in high school chemistry on the basis of curriculum standards. It was concluded that the teaching goal of crystallization (recrystallization) in high school chemistry was not the subject knowledge teaching of crystallography or a simple training of experiment skills and methods, it should be the auxiliary teaching around the core concept of "solubility and its application"; the cognitive boundary should be the understanding of solubility concept in separation and purification; a good grasp towards the cognitive boundary of basic science education content, was the difference between the scientific research and science education, scientific research achievement and science education material.
WU Xin-Jian, WANG A-Lian, ZHANG Xian-Jin, YE Yan-Zhu. Cognitive Scope and Boundary in Basic Science Education: Teaching of Crystallization (Recrystallization) in High School Chemistry[J]. Chinese Journal of Chemical Education, 2019, 40(1): 67-70.
