The interpretation of Data for potentiometric titration of weak acid mixtures by multiple linear regression analysis

Abstract

Potentiometric titration technique can be used for determination of two weak acid mixtures including with the development and modification of equation in order to find the equivalent volume of weak acid mixtures. The statistical procedure, multiple linear regression analysis, and computer program, SPSS/PC, are used for the analysis of data. From the experiments, the equivalent volumes of two weak acid mixtures could be accurately determined by this method. However, error in equivalent points determination occurred when ApKa of the two weak acids was less than two or there was the alkaline error in pH measurement, when pH value of the solution was above ten.