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Transactions of the INDIAN CERAMIC SOCIETY   Vol. 32  1973
Polybasic Acid Character of Hydrogen Clay Minerals: Multiple Dissociation Constants and Free Energy Changes in Neutralisation Reaction
M. ADHIKARI AND M. K. MAJUMDAR
Pages : 129-134
DOI : 10.1080/0371750X.1973.10840577
Abstract
Potentiometric titration of clay poly acidoids prepared by the action of dilute acids on clay fractions isolatedfrom kaolin, aquagel, sedimentary rock, soil, vermiculites and chlorite schist showed two inflections (except in acid montmorillonoid) due to reaction of H+ and A/3+ and polymeric hydroxy AI and Fe with bases. Attempt has been made to show how the titration behaviour, the dissociation constants (pK values) of clay acidoids and the free energy changes in neutralisation reactions are dependent on the chemical composition and charge on unit structural layers.
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