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 Education and Research Institute, Hefei 230000, China
Abstract Based on experimental inquiry, a principle model of concentration cells was constructed by focusing on the influence of concentration on the oxidizing and reducing abilities of substances, without introducing electrode potential or the Nernst equation. By comparing the current in concentration cells under conditions with no ion-exchange membrane, a cation-exchange membrane, and an anion-exchange membrane, the microscopic mechanism of concentration cells was further explored. This approach corrects the common misconception that “cation (anion) exchange membranes are perfectly permselective to cations (anions)” thereby revealing the actual working mechanism of ion-exchange membranes.
SHEN Yan, SHEN Xiang-Bo, XU Hong, ZHU Cheng-Dong. Innovative Experiment on Concentration Cell for Developing Evidence Reasoning and Model Construction Literacy[J]. Chinese Journal of Chemical Education, 2026, 47(9): 74-80.
