基于Scilab准确计算非对称氧化还原滴定终点误差的方法  

A General Method for Accurately Calculating the End-Point Errors of Asymmetric Redox Titrations Using Scilab

作　　者：苏铁军 Tiejun Su(College of Materials and Chemical Engineering,Jingzhou University,Jingzhou 434020,Hubei Province,China)

机构地区：[1]荆州学院材料与化工学院,湖北荆州434020

出　　处：《大学化学》2023年第2期277-282,共6页University Chemistry

基　　金：湖北省高等学校省级教学研究项目(2021532);湖北省教育厅科学技术研究项目(B2020339)。

摘　　要：非对称氧化还原滴定终点误差不仅与滴定终点的电势有关,还与滴定产物的平衡浓度有关,这给终点误差的计算带来了困难。针对这一问题,在综合考虑氧化还原反应物料平衡、电子平衡和能斯特方程等数量关系的基础上,构建了以滴定产物平衡浓度和滴定体积比为未知量的耦合方程组。基于Scilab求解了该方程组,将求解结果代入相关计算公式,所得终点误差与文献值是相符的。The end-point error of an asymmetric redox titration is related to the potential of the end-point and equilibrium concentration of the titration product,both of which are bottlenecks in the calculation of the end-point error.To overcome these problems,we have comprehensively considered the quantitative relationship between material balance,electronic balance,and the Nernst formula.On this basis,a series of equations were constructed,whose unknowns were the equilibrium concentration of titration product and titration volume ratio.The equations were solved using a software called Scilab.By substituting the solution results into the relevant formula,the end-point error could be obtained,which was consistent with the literature value.

关 键 词：氧化还原滴定 终点误差 非对称电对 数值计算 

分 类 号：G64[文化科学—高等教育学] O6[文化科学—教育学]