大学化学 >> 2026, Vol. 41 >> Issue (5): 131-140.doi: 10.12461/PKU.DXHX202511002

所属专题: 第5届全国大学生化学实验创新设计大赛

专题 上一篇    

醋酸电离平衡常数测定实验的改进

张春芳1,2, 刘月华1, 杨林1, 徐文慧1, 闰明涛1,2, 张翠妙1,2   

  1. 1 河北大学化学与材料科学学院, 河北 保定 071002;
    2 化学国家级实验教学示范中心(河北大学), 河北 保定 071002
  • 收稿日期:2025-11-03 录用日期:2026-02-25 发布日期:2026-05-21
  • 通讯作者: 张翠妙 E-mail:cmzhanghbu@163.com Cuimiao Zhang
  • 基金资助:
    2025年河北省研究生示范课程建设项目(KCJSX202503);2025年河北省高等教育教学改革与实践项目(2025GJJG042);材料化学国家一流专业(YS23-YLZY-021);第二批国家级一流本科课程《结构化学》;教指委教学研究与实践项目(H20230804)

Improvement on the experimental determination of ionization equilibrium constant for acetic acid

Chunfang Zhang1,2, Yuehua Liu1, Lin Yang1, Wenhui Xu1, Mingtao Run1,2, Cuimiao Zhang1,2   

  1. 1 College of Chemistry and Materials Science, Hebei University, Baoding 071002, Hebei Province, China;
    2 National Experimental Teaching Demonstration Center of Chemistry (Hebei University), Baoding 071002, Hebei Province, China
  • Received:2025-11-03 Accepted:2026-02-25 Published:2026-05-21
  • Contact: Cuimiao Zhang E-mail:cmzhanghbu@163.com

摘要: 本文以电导法测定醋酸电离平衡常数实验为例,针对其探究性不足、微观机制缺失及数据处理传统等问题,从三方面进行了改进:拓展实验内容与方法以强化探究性、引入理论计算以揭示微观机理、使用自研微信小程序以实现数据处理智能化。这些举措提升了该项目的“两性一度”,为构建理论与实验融合的教学范式提供了典型案例。

关键词: 标准电离平衡常数, pH计法, 勒夏特列原理, Gaussian软件, 水合离子

Abstract: This study comprehensively reforms the classic physical chemistry experiment involving the determination of the ionization equilibrium constant of acetic acid via conductometry. It addresses three key limitations: insufficient support for inquiry-based learning, lack of microscopic mechanistic insight, and reliance on conventional data processing methods. The reform incorporates three main strategies: expanding experimental protocols to enhance exploratory learning, introducing theoretical calculations to elucidate microscopic mechanisms, and implementing a custom-developed WeChat mini-program for intelligent data processing. These improvements significantly elevate the project’s “high-order, innovative, and challenging” quality, presenting a practical paradigm for a novel teaching model that effectively integrates theory and experimentation.

Key words: Standard ionization equilibrium constant, pH meter method, Le Châtelier’s principle, Gaussian software, Hydrated ion