期刊
FLUID PHASE EQUILIBRIA
卷 226, 期 -, 页码 261-265出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.fluid.2003.08.007
关键词
activity coefficient; osmotic coefficient; isopiestic apparatus; NaCl; KCl; isopiestic method; vapour-liquid equilibria
Osmotic coefficients of aqueous KCl solutions have been determined by the isopiestic method using standard NaCl reference solutions for comparison. Measurements were made at 283.15, 288.15. 293.15, and 298.15 K. A modified isopiestic apparatus is described. Equilibrium times ranged from 4 to around 15 days. The equilibrium molalities went up to 1.0 m. The average relative uncertainty of the observed eater activities of the solutions was less than 0.005%. The activity and osmotic coefficients of KCl aqueous solutions at several temperatures are compared with literature data. (C) 2003 Elsevier B.V. All rights reserved.
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