Solubility in the KVO₃−KCl−H₂O System from 293 to 323 K

Abstract

Solubility of potassium metavanadate and potassium chloride in aqueous solutions within temperature range of 293 K to 323 K was measured employing the isothermal solution saturation method. The vanadium ion concentration was determined using a spectrophotometric method with hydrogen peroxide. The chloride ion concentration was measured by means of the potentiometric titration method with prior reduction of vanadium ions with sodium sulfite(IV). These results were used to the construction of a polytherm section in the KVO 3 −KCl−H 2 O system. Additionally, the density interdependence of equilibrium solutions versus both salt concentrations, expressed in mole fractions, is presented.