大学化学

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氧化还原滴定中的电子守恒

李英斌1,2, 徐晓文1, 邹桂征1, 张斌1   

  1. 1 山东大学化学与化工学院, 山东 济南 250100;
    2 山东大学泰山学堂, 山东 济南 250100
  • 收稿日期:2026-05-12 录用日期:2026-07-28
  • 通讯作者: 张斌 E-mail:binzhang68@sdu.edu.cn Bin Zhang
  • 基金资助:
    山东大学教育教学改革研究项目(2023Y105, 2025Y55)

Conservation of electrons in redox titration

Yingbin Li1,2, Xiaowen Xu1, Guizheng Zou1, Bin Zhang1   

  1. 1 School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, Shandong Province, China;
    2 Taishan College, Shandong University, Jinan 250100, Shandong Province, China
  • Received:2026-05-12 Accepted:2026-07-28
  • Contact: Bin Zhang E-mail:binzhang68@sdu.edu.cn

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摘要： 氧化还原滴定的有关理论是分析化学教学中的重要组成部分，电子守恒反映了氧化还原滴定反应的内在本质，理解并应用电子守恒对涉及复杂氧化还原滴定体系结果的准确分析有重要意义。本文以化学需氧量的测定(重铬酸钾法)和水溶液中乙二醇含量的测定等实际应用为例，通过对氧化还原滴定结果计算方法的分析处理，说明了电子守恒方法在实际应用中处理氧化还原体系尤其是复杂体系的优势。

关键词: 分析化学, 氧化还原滴定, 电子守恒, 氧化还原平衡

Abstract: The theory of redox titration constitutes an important component of analytical chemistry education. The conservation of electrons reflects the intrinsic nature of redox titration reactions, and understanding and applying this principle is of great significance for the accurate analysis of results in complex redox titration systems. In this paper, practical applications such as the determination of chemical oxygen demand (potassium dichromate method) and the measurement of ethylene glycol content in aqueous solutions are taken as examples. Through the analysis and processing of calculation methods for redox titration results, the advantages of the electron conservation approach in handling redox systems, particularly complex systems, in practical applications are demonstrated.

Key words: Analytical chemistry, Redox titration, Conservation of electrons, Redox balance