Abstract Stoichiometric ratio has important applications in middle school teaching and actual production. Aiming at the shortcomings of the concept teaching of stoichiometric ratio, this research uses the handheld technology TQVC conceptual cognitive model as the theoretical basis to design experiments to determine the stoichiometric ratio of neutralization reaction. Based on the equimolar continuous change method, this experiment uses a temperature sensor to measure the temperature change data of reactants with different molar ratios to find out the reactant molar ratio corresponding to the maximum temperature change difference, that is, the stoichiometric ratio, to help students from a quantitative perspective understand the concept of stoichiometric ratio.
LIN Hui-Mei, QIAN Yang-Yi, WU Bao-Zhu, CHEN Liu-Qing, YE Jian-You, WANG Lei-Ming. Determination of Stoichiometric Ratio of Neutralization Reaction Using Digital Experiment with Handheld Technology[J]. Chinese Journal of Chemical Education, 2021, 42(17): 85-89.
