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Liquid Junction Potentials and Transference Numbers in Montmorillonite Suspensions
Author(s) -
Shainberg I.,
Caiserman A.
Publication year - 1970
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.197000036
Subject(s) - chemistry , montmorillonite , electrode , ionic bonding , analytical chemistry (journal) , chromatography , ion , organic chemistry
The EMF's of concentration cells with and without transference were determined. The cells consist of two compartments each containing an equal concentration of K‐montmorillonite with a different KCl concentration at the two sides of the liquid junction. The EMF's were determined with Ag/AgCl electrodes and a K‐sensitive glass electrode. The liquid junction potential and the transference number of the ionic species in the suspensions were calculated from the data of the EMF. The liquid junction potential (being zero for KCl solution), and the transference number of K + , were found to increase with the increase in the clay concentration. This indicates that pH measurements in clay suspensions involve a liquid junction at the KCl bridge which cannot be disregarded.