Abstract Grinding can not only fully mix the reactants, but also make the reactants produce new lattice defects and increase the total energy of the system, thereby activating the reactants and promoting the occurrence of chemical reactions. Therefore, grinding is an important chemical experimental operation. However, people’s awareness and understanding of grinding effect, grinding substance, grinding time and other issues are not sufficient, and grinding operations have been neglected for a long time. After comprehensively comparing the various improvement schemes of the three difficult experiments, it is found that the methods of fully grinding the reactants, drying the reactants, adopting new reactants, and doping other substances in the reaction system are all repeated in various improvement schemes, revealing that the common cause is the occurrence of lattice defects from the perspective of material structure. Based on the research results, matters needing attention for the grinding operations and two suggestions for the preparation of high school chemistry textbooks are proposed.
LONG Qi, CHEN Chang-Yun, SUN Gao-Ai, ZHANG Chun-Yun, ZHOU Xing-Yu, SHAO Yang. Grinding: An Important Experimental Operation That Has Been Neglected[J]. Chinese Journal of Chemical Education, 2024, 45(15): 96-101.
