Please use this identifier to cite or link to this item:
https://open.uns.ac.rs/handle/123456789/13677
Title: | Conductivity study with caffeinate anion - Caffeic acid and its sodium and potassium salts | Authors: | Apelblat A. Vraneš, Milan Gadžurić, Slobodan Bešter-Rogač M. |
Issue Date: | 15-Feb-2020 | Journal: | Journal of Molecular Liquids | Abstract: | © 2019 Elsevier B.V. Precise electrical conductivities of dilute aqueous solutions of caffeic acid, sodium caffeinate, potassium caffeinate were determined in the temperature range from 278.15 K to 313.15 K (values for caffeic acid and potassium caffeinate solutions are reported for the first time in this paper). The experimental data of caffeic acid salts were analyzed by using the Kohlrausch and Onsager conductivity equation, yielding the limiting conductances of caffeinate anion, their diffusion coefficients at infinite dilution, and the Stokes radii. The equilibrium constants of the first dissociation step of caffeic acid were evaluated by applying the Quint-Viallard conductivity equations for 1:1 type electrolytes, and the Debye-Hückel expression for activity coefficients. Temperature dependence of the equilibrium constant permitted to obtain the standard thermodynamic functions of the dissociation process. The good agreement between experimental and calculated conductances of caffeic acid indicates the reliability of applied molecular model. | URI: | https://open.uns.ac.rs/handle/123456789/13677 | ISSN: | 01677322 | DOI: | 10.1016/j.molliq.2019.112219 |
Appears in Collections: | PMF Publikacije/Publications |
Show full item record
SCOPUSTM
Citations
2
checked on May 10, 2024
Page view(s)
30
Last Week
8
8
Last month
6
6
checked on May 10, 2024
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.