大学化学 >> 2024, Vol. 39 >> Issue (11): 365-373.doi: 10.3866/PKU.DXHX202401086

师生笔谈 上一篇    下一篇

从电荷平衡式出发对酸碱滴定曲线与终点误差的统一处理与讨论

邵利民1, 李娜2   

  1. 1 中国科学技术大学化学与材料科学学院, 合肥 230026;
    2 北京大学化学与分子工程学院, 北京 100871
  • 收稿日期:2024-01-30 录用日期:2024-03-12 发布日期:2024-04-12
  • 通讯作者: 李娜 E-mail:lina@pku.edu.cn

A Unified Equation Derived from the Charge Balance Equation for Constructing Acid-Base Titration Curve and Calculating Endpoint Error

Limin Shao1, Na Li2   

  1. 1 School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China;
    2 College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
  • Received:2024-01-30 Accepted:2024-03-12 Published:2024-04-12
  • Contact: Na Li E-mail:lina@pku.edu.cn

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摘要： 本文从电荷平衡式(Charge Balance Equation，CBE)出发，推导滴定曲线的反函数V= g([H+])，并直接利用反函数计算终点误差。利用CBE公式的特点，将所有酸碱体系的CBE形式统一起来；而滴定曲线与终点误差的直接关联，为学习者提供一个理解酸碱平衡内涵的新视角。

关键词: 电荷平衡式, 反函数, 酸碱平衡, 酸碱滴定曲线, 终点误差

Abstract: Starting from the Charge Balance Equation (CBE), this paper derives the inverse function V= g([H+]) for the titration curve, and directly employs this inverse function to calculate the endpoint error. Based on the characteristics of the CBE formula, the CBE forms of all acid-base systems are unified, and the straightforward correlation between the titration curve and the endpoint error provides learners with a new perspective to understand the connotation of acid-base equilibrium.

Key words: Charge balance equation, Inverse function, Acid-base equilibrium, Acid-base titration curve, Titration error