A New Predictive Equation for the Surface Tensions of Aqueous Mixed Ionic Solutions Conforming to the Linear Isopiestic Relation |
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Authors: | Yu-Feng Hu |
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Affiliation: | (1) State Key Laboratory of Heavy Oil Processing, University of Petroleum, Beijing, 102200, China |
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Abstract: | The linear isopiestic relation has been used, together with the fundamental Butler equations, to establish a new simple predictive equation for the surface tensions of the mixed ionic solutions. This newly proposed equation can provide the surface tensions of multicomponent solutions using only the data of the corresponding binary subsystems of equal water activity. No binary interaction parameters are required. The predictive capability of the equation has been tested by comparing with the experimental data of the surface tensions for the systems HCl–LiCl–H2O, HCl–NaClO4–H2O, HCl–CaCl2–H2O, HCl–SrCl2–H2O, HCl–BaCl2–H2O, LiCl–NaCl–H2O, LiCl–KCl–H2O, NaCl–KCl–H2O, KNO3–NH4NO3–H2O, and LiCl–NaCl–KCl–H2O at 298.15 K; KNO3–NH4Cl–H2O, KBr–Sr(NO3)2–H2O, NaNO3–Sr(NO3)2–H2O, NaNO3 –(NH4)2SO4–H2O, KNO3–Sr(NO3)2– H2O, NH4Cl–Sr(NO3)2–H2O, NH4Cl– (NH4)2SO4–H2O, KBr–KCl–H2O, KBr–KCl–NH4Cl–H2O, KBr–KNO3– Sr(NO3)2–H2O, KBr–NH4Cl–Sr(NO3)2–H2O, KNO3–NH4Cl–Sr(NO3)2–H2O, and NH4Cl–(NH4)2SO4–NaNO3–H2O at 291.15 K; and KBr–NaBr–H2O at temperatures from 283.15 to 308.15 K. The agreement is generally quite good. |
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Keywords: | Surface tension ionic solutions linear isopiestic relation fundamental Butler equations |
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