多相体系的酸碱解离平衡:气相的影响  

Acid-Base Dissociation Equilibrium in Multiphase System:Effect of Gas

作　　者：张晓武 刘湃 黄启燊 庞树峰 高志明 张韫宏 Xiaowu Zhang;Pai Liu;Qishen Huang;Shufeng Pang;Zhiming Gao;Yunhong Zhang(Chemistry&Chemical Engineering School,Beijing Institute of Technology,Beijing 102488,China)

机构地区：[1]北京理工大学化学与化工学院,北京102488

出　　处：《大学化学》2024年第4期387-394,共8页University Chemistry

基　　金：2023年研究生案例教学建设(3100012052304);北京市高等教学学会课题(1330012052301)。

摘　　要：酸碱平衡是化学教学中十分重要的内容,而在目前的教学中仅仅描述了均相溶液中的酸碱解离与pH缓冲问题,并未描述多相体系中气相成分对体系酸碱解离与pH缓冲的影响。针对该问题,本文以典型的气溶胶多相体系为例,通过对多相缓冲理论和有效解离常数pK_(a)^(*)的分析,讨论了多相体系中组分挥发性和吸湿性对体系酸碱平衡的影响,进而开拓学生思维,并为多相体系酸碱平衡的教学提供新范例。Acid-base equilibrium is a crucial topic in chemical education.However,current teaching practices only focus on describing acid-base dissociation and pH buffering in homogeneous solutions,without considering the influence of gas-phase components on acid-base dissociation and pH buffering in multiphase systems.To address this issue,this paper takes a typical aerosol multiphase system as an example and examines the impact of component volatility and hygroscopicity on the acid-base equilibrium in multiphase systems through the analysis of multiphase buffering theory and the effective dissociation constant pK_(a)^(*).By doing so,it aims to stimulate students’thinking and provide a new paradigm for teaching acid-base equilibrium in multiphase systems.

关 键 词：多相缓冲理论 酸碱平衡 有效解离常数 

分 类 号：G64[文化科学—高等教育学] O6[文化科学—教育学]