Promote Students’ Learning of Complexes by Hand-Held Technology Digital Experiment: Formation and Destruction of Copper-Ammonia Complexes
LI Qi-Lin1,2, QIAN Yang-Yi1**, ZHANG Hui-Min1,3, TANG Wen-Xiu1,4, LIN Dan-Ping1,5
1.School of Chemistry, South China Normal University, Guangzhou 510006, China;
2.No.1 Middle School of Zhongshan, Zhongshan 528403, China;
3.Baoan Middle School (Group) The 2nd Foreign Language School, Shenzhen 518000, China;
4.Guangdong Panyu Middle School, Guangzhou 511400, China;
5.Shenzhen Xin’an Middle School (Group), Shenzhen 518000, China
Abstract Starting from the issues existing in the teaching of complexes concept, this study explored the formation and destruction of copper-ammonia complexes by using the pH sensor and conductivity sensor of hand-held technology based on the TQVC conceptual cognitive model. Firstly, the copper sulfate solution was titrated with ammonia water, and then the copper-ammonia complex solution was titrated with sulfuric acid. At the same time, the pH and conductivity change curves of the reaction process were obtained. According to the Tetra-Representation model, the reaction process was analyzed from four angles: macroscopic, microscopic, symbol and curves. It revealed the essence of reaction and realized the effective construction of complex concept in multidimensional degree.
LI Qi-Lin, QIAN Yang-Yi, ZHANG Hui-Min, TANG Wen-Xiu, LIN Dan-Ping. Promote Students’ Learning of Complexes by Hand-Held Technology Digital Experiment: Formation and Destruction of Copper-Ammonia Complexes[J]. Chinese Journal of Chemical Education, 2020, 41(1): 79-88.
