Thermodynamic treatment of exchange of H+and K+in α-titanium phosphate
- 1 January 1985
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 9,p. 1865-1867
- https://doi.org/10.1039/dt9850001865
Abstract
The H+/K+ ion-exchange process in α-titanium phosphate, Ti(HPO4)2·H2O, was studied, titration curves and exchange isotherms being obtained at 25.0, 40.0, and 55.0 (± 0.1)°C. Partial decomposition of the exchanger was detected. No partially substituted phases were detected by X-ray diffraction and the final product was Ti(KPO4)2·3H2O. The free energy, enthalpy, and entropy for the exchange reaction are determined, and the results are explained by means of structural considerations.Keywords
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