关于酸碱滴定法中pH和终点误差计算的几点见解

Some Opinions on the Calculation of pH and Titration Error in Acid-base Titration

p H和终点误差计算是酸碱滴定法中重要的计算部分,但在现行的分析化学教材中,计算公式、简化过程及条件繁多,不便于学生理解及掌握。针对这一问题,本文重点讨论了采用统一的电荷平衡式和分布分数代换计算pH和终点误差。运用该方法可实现对不同溶液体系pH计算以及不同滴定体系终点误差计算,有助于提升大学生自主学习和解决问题的能力。

The calculation of pH and titration error are important in acid-base titration. However, in the current analytical chemistry textbooks, there are many calculation formulas, simplified procedures and conditions, which are not easy for students to understand and master. To solve this problem, this article focuses on the use of a unified charge balance equation and distribution fraction substitution to calculate pH and titration error. This method could be used to calculate the pH of different solution systems and the titration errors of different titration systems, thus further improve the ability of college students to learn and solve problems independently.