Abstract
The approximate nature of Gran’s method of linearization of potentiometric titration curves applied to diprotic systems has been thoroughly investigated. A function involving pH and titrant volume V (which is linearly dependent on V and becomes zero at the first equivalent point of titration of a weak diprotic base with a strong monoprotic acid) has been critically examined and validated by means of widely extended simulated experiments. Accurate experimental confirmation of the theoretical expressions has been obtained by performing many real titrations of the primary standard Na2CO3 with HCl. This particular application, analytically significant itself, can be a prototype of analogous applications.
Similar content being viewed by others
Author information
Authors and Affiliations
Additional information
Received: 25 March 1996/Revised: 15 November 1996/Accepted: 19 November 1996
Rights and permissions
About this article
Cite this article
Pezzatini, G., Loglio, G. & Becagli, S. Potentiometric titration of diprotic systems. Fresenius J Anal Chem 358, 465–470 (1997). https://doi.org/10.1007/s002160050447
Issue Date:
DOI: https://doi.org/10.1007/s002160050447