关键词: 氧化还原滴定, 终点误差, 非对称电对, 数值计算

Abstract:

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.

Key words: Redox titration, End-point error, Asymmetric electric pair, Numerical calculation