大学化学 >> 2024, Vol. 39 >> Issue (4): 387-394.doi: 10.3866/PKU.DXHX202310021

师生笔谈 上一篇    下一篇

多相体系的酸碱解离平衡：气相的影响

张晓武, 刘湃, 黄启燊, 庞树峰, 高志明, 张韫宏   

  1. 北京理工大学化学与化工学院, 北京 102488
  • 收稿日期:2023-10-10 修回日期:2023-11-21 发布日期:2023-12-14
  • 通讯作者: 张韫宏 E-mail:yhz@bit.edu.cn
  • 基金资助:
    2023年研究生案例教学建设(3100012052304)；北京市高等教学学会课题(1330012052301)

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

Xiaowu Zhang, Pai Liu, Qishen Huang, Shufeng Pang, Zhiming Gao, Yunhong Zhang   

  1. Chemistry & Chemical Engineering School, Beijing Institute of Technology, Beijing 102488, China
  • Received:2023-10-10 Revised:2023-11-21 Published:2023-12-14

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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pKa*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。

关键词: 多相缓冲理论, 酸碱平衡, 有效解离常数

Abstract: 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 pKa*. By doing so, it aims to stimulate students’ thinking and provide a new paradigm for teaching acid-base equilibrium in multiphase systems.

Key words: Multiphase buffer theory, Acid-base equilibrium, Effective dissociation constant