大学化学 >> 2024, Vol. 39 >> Issue (4): 382-386.doi: 10.3866/PKU.DXHX202310043

师生笔谈 上一篇    下一篇

基于副反应形成配合物浓度的计算公式及应用

叶存玲1, 赵茜彤1, 王洪芳1, 王治科2   

  1. 1 河南师范大学化学化工学院, 河南 新乡 453007;
    2 河南师范大学环境学院, 河南 新乡 453007
  • 收稿日期:2023-10-10 修回日期:2023-11-22 发布日期:2023-12-05
  • 通讯作者: 叶存玲 E-mail:ycl@htu.edu.cn
  • 基金资助:
    河南师范大学研究生教育改革与质量提升工程项目(XY2023ZX02)；河南省高等教育教学改革研究与实践项目(学位与研究生教育,2021SJGLX208Y)

A Formula for the Calculation of Complex Concentrations Arising from Side Reactions and Its Applications

Cunling Ye1, Xitong Zhao1, Hongfang Wang1, Zhike Wang2   

  1. 1 College of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, Henan Province, China;
    2 Institute of Environment, Henan Normal University, Xinxiang 453007, Henan Province, China
  • Received:2023-10-10 Revised:2023-11-22 Published:2023-12-05

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摘要： 配位滴定法，常用的滴定剂为EDTA (Y)，体系中常存在各类副反应。本文从副反应系数(α)出发，推导出达到化学计量点时，基于配体Y与其他共存金属离子(Nn+)，或待测金属离子(Mn+)与其他配体(L)等副反应形成配位比为1: 1的NY或ML浓度的计算公式，所得结果使该配合物浓度的计算问题得到简化。

关键词: 配位滴定法, 副反应系数, 普适公式

Abstract: In complexometric titration, ethylenediaminetetraacetic acid (EDTA), commonly referred to as Y, is the titrant of choice. This system often encompasses various side reactions. This paper derives a formula at the stoichiometric point, based on the side reaction coefficient (α), for calculating the concentration of NY or ML coordination compounds with a coordination ratio of 1 : 1, where NY represents the complex of ligand Y with coexisting metal ions (Nn+), and ML denotes the complex of the target metal ions (Mn+) with other ligands (L). The formulation significantly streamlines the computation of these complex concentrations.

Key words: Complexometric titration, Side reaction coefficient, General formula