Thermodynamic equilibrium study of Phosphorus pentoxide (cas 1314-56-3)-water binary system: The stability and solubility of 10H3PO4.H2O

Add time:08/15/2019    Source:sciencedirect.com

In this study, new experimental data for the binary system of water–phosphorus pentoxide are presented in the temperature range from 235.15 to 302.15 K using the conductimetric method, this synthetic method was successfully and effectively used to define the branches of stable solubility of several complex systems. In this work, two hydrates 2H3PO4·H2O (semi-hydrate) and 10H3PO4.H2O (deci-hydrate) were identified and characterized by X ray diffraction and volumetric titration with discussion of their stability zone. Thermodynamic modeling of solid-liquid equilibrium in the binary system of P2O5–H2O is also presented based on this experimental solubility data using a modified electrolytic Uniquac model (Extended Universal Quasichimical model).

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