高中化学“水溶液中的离子反应与平衡”项目式教学——认识二氧化碳过度排放对天然水体的影响

Project-Based Teaching of “Ion Reaction and Equilibrium in Aqueous Solution” in Senior High School Chemistry:Recognize the Impact of Excessive CO_(2) Emission on Natural Water Bodies

以寻找CO_(2)过度排放会引起珊瑚白化死亡的证据为项目开展的主要线索,通过对天然水体中碳酸根等含碳微粒浓度随pH变化及大气中CO_(2)分压的增大、CO_(2)的温室效应对海洋吸收二氧化碳能力影响的简单数学推导,引导学生构建简单数学模型并对模型做出定性的理论解释。此过程培养了学生运用平衡思想解决科学问题的高阶思维能力,完善了学生的平衡观,提升了学生的证据推理与模型认知素养。

This paper focused on improving high school students' ability to analyze chemical problems utilizing mathematical models. Based on the project “analyzing the relationship between the excessive CO_(2) emission and the death of coral death”, we guided the students to formulate the impact of water pH on the carbon particle concentration, along with the influence of the CO_(2)'s partial pressure and the greenhouse effect on the ocean's ability to absorb CO_(2) into mathematical models. This process had cultivated students' high-level thinking ability to solve scientific problems by the balanced thought, constructed the balanced view, and improved their evidential reasoning and model cognitive competence.