Implementation of the “Experiment-Property-Principle” Ternary Integrated Strategy in Chemistry Review of Senior Three: Taking “Weak Electrolyte Ionization and Equilibrium” for Example
ZHONG Guo-Hua1, LIN Jian-Fen2
1. Guangdong Guangya High School, Guangzhou 510160, China;
2. Shenzhen Longgang Lanling School, Shenzhen 518117, China
Abstract This paper expounded the connotation of "Experiment-Property-Principle" ternary integrated strategy and its implementation and application in chemistry review of senior three. Taking "weak electrolyte ionization and equilibrium" for example, this paper took experimental investigation of "the difference between the same concentration of hydrochloric acid and acetic acid" for driving task, combined with the phenomenon of hydrochloric acid and acetic acid respectively react with magnesium in different periods, let students draw curve of c(H+)-t to analyze the change of c(H+), according to the chemical reaction principle to predict possible reasons, and made the "macro-micro-symbol" triple characterization of the strong and weak electrolytes. This paper introduced data analysis activity of ionization equilibrium constant with the learning tasks of problem solving strategy of "reasons" and training, chart reading method, method of control variables and so on, put forward some teaching suggestions for chemistry review of senior three.
ZHONG Guo-Hua, LIN Jian-Fen. Implementation of the “Experiment-Property-Principle” Ternary Integrated Strategy in Chemistry Review of Senior Three: Taking “Weak Electrolyte Ionization and Equilibrium” for Example[J]. Chinese Journal of Chemical Education, 2018, 39(5): 38-43.
