Chemical Idea of “Structure Determines Property ” in College Entrance Exam: Structural Analysis of the Reaction Products Between Iodine and Sodium Thiosulfate
SHEN Yan1, XU Hong2**, DONG Shun3, GUAN Wen-Mei1
1. Anhui Ningguo Senior High School, Xuancheng 242300,China; 2. Teaching and Research Department of Xuancheng Education and Sports Bureau, Xuancheng 242000, China; 3. Anhui Dangshan Senior High School, Dangshan 235300,China
Abstract Combining theoretical calculations and data to argue the structure of the products from the reaction of iodine with sodium thiosulfate from the perspectives of thermodynamics, kinetics, and reaction regularities. An analysis of students’ answers reveals that inadequate knowledge reserves, a lack of structured understanding, and rigid cognition regarding the relationship between bond energy and bond length lead to errors in their responses. Based on this, a series of questions are used to guide students in their analysis, enabling them to achieve a structured understanding of the principle that “structure determines properties”, and thereby, in specific contexts, combining principles to explore and construct a cognitive model of the relationship between bond length and bond energy.
SHEN Yan, XU Hong, DONG Shun, GUAN Wen-Mei. Chemical Idea of “Structure Determines Property ” in College Entrance Exam: Structural Analysis of the Reaction Products Between Iodine and Sodium Thiosulfate[J]. Chinese Journal of Chemical Education, 2025, 46(9): 19-25.
