Thermodynamic properties on quaternary aqueous solutions of chlorides charge-type 1-1*2-1*2-1: XCl + MgCl2 + CaCl2 + H2O with (X ≡ Na; NH4) |
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Authors: | Mohamed El Guendouzi Rachid Azougen |
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Institution: | Laboratoire de Chimie Physique, Faculté des Sciences Ben M''sik, Université Hassan II Mohammedia, B.P. 7955, Casablanca, Morocco |
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Abstract: | In this investigation, the quaternary aqueous solutions of chlorides charge-type 1-1*2-1*2-1 with a cation (Na+; NH4+; Mg2+; Ca2+) have been studied using the hygrometric method at 298.15 K. The water activities of the systems NH4Cl + MgCl2 + CaCl2 + H2O and NaCl + MgCl2 + CaCl2 + H2O are measured at total molalities from 0.60 mol kg−1 to saturation for different ionic-strength fractions NH4Cl or NaCl, y = 0.20, 0.50, 0.80, and z ratio ionic-strength for other solutes, with z = 0.20, 0.50 and 0.80 for each y. The obtained data allow the deduction of osmotic coefficients. |
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Keywords: | Quaternary aqueous solution Ammonium&ndash magnesium&ndash calcium chlorides Sodium&ndash magnesium&ndash calcium chlorides Hygrometric method Water activity Osmotic and activity coefficient Ionic interaction model |
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