大学化学 >> 2026, Vol. 41 >> Issue (3): 373-380.doi: 10.12461/PKU.DXHX202505023

化学实验 上一篇    下一篇

碳酸钠含量的测定：电导率滴定法

张方岩, 李雨涵, 何博文, 林猛, 马莹   

  1. 山东大学化学与化工学院, 济南 250100
  • 收稿日期:2025-05-08 录用日期:2025-06-13 发布日期:2026-03-24
  • 通讯作者: 林猛, 马莹 E-mail:maying@sdu.edu.cn;mlin@sdu.edu.cn Meng Lin, Ying Ma
  • 基金资助:
    山东省本科教学改革研究项目(Z2024043, M2024007)；山东大学本科教育教学改革研究一般项目(2024Y119)；山东大学实验室建设与管理研究项目(sy20232204, sy20242201))

Determination of Sodium Carbonate Content: A Conductometric Titration Approach

Fangyan Zhang, Yuhan Li, Bowen He, Meng Lin, Ying Ma   

  1. School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
  • Received:2025-05-08 Accepted:2025-06-13 Published:2026-03-24
  • Contact: Meng Lin, Ying Ma E-mail:maying@sdu.edu.cn;mlin@sdu.edu.cn

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摘要： 电导率滴定法是利用滴定终点前后电导率的突变来确定终点的滴定分析方法，运用电导率滴定法可以更加简便、精密地获取物质含量，此法已经在水质分析、科学研究中得到广泛应用。本实验项目将电导率滴定法引入无机化学实验教学中，以一个经典无机化学实验项目——碳酸钠的含量测定为例，基于电导率滴定法进行含量分析，熟悉电导率滴定的相关操作，定量分析碳酸钠中的物质组成，并与双指示剂法进行对比分析，了解不同滴定方法的原理和误差。

关键词: 电导率滴定, 电导率, 含量测定, 双指示剂滴定

Abstract: Conductometric titration is a titration analysis method that determines the endpoint based on the sudden change in conductivity before and after the endpoint. This method can be used to obtain the content of substances more simply and precisely and has been widely applied in water quality analysis and scientific research. This experimental project introduces the conductometric titration method into inorganic chemistry experimental teaching. Taking a classic inorganic chemistry experimental project - the determination of sodium carbonate content as an example, content analysis is carried out based on the conductometric titration method. Familiarizing with the relevant operations of conductometric titration, quantitative analysis of the substance composition in sodium carbonate is conducted, and compared with the dual indicator method to understand the principles and errors of different titration methods.

Key words: Conductometric titration, Conductivity, Content determination, Double indicator titration