Acta Phys. -Chim. Sin. ›› 1999, Vol. 15 ›› Issue (10): 956-960.doi: 10.3866/PKU.WHXB19991018

• Note • Previous Articles    

Isopiestic Determination of Activity Coefficients of LiCl and CaCl2 in LiCl-CaCl2-H2O System at 298.15K

Long Guang-Ming, Yao Yan, Wang Feng-Qin, Wang Rui-Ling   

  1. Institute of Salt Lakes,Chinese Academy of Science,Xi'an 710043
  • Received:1998-12-03 Revised:1999-03-30 Published:1999-10-15
  • Contact: Long Guang-Ming

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Abstract:

The isopiestic method was used to determinate isopiestic molality and osmotic coefficients in single salt solutions of LiCl-H2(molality range from 0.5 to 9.0 mol•kg -1 ), CaCl2-H2O(molality range from 0.35 to 5.2 mol•kg -1 ) and multisalt solution LiCl-CaCl2-H2O(ionic strength range from 0.5 to 15.7 mol•kg -1 ) at 298.15K, from which Pitzer's interaction parameters of single salt ,mixed salts of the systems were obtained. The mean ionic activity coefficients of LiCl、CaCl 2 in pure and mixed solutions were reported.

Key words: LiCl, CaCl2, Activity coefficients, Isopiestic method, Pitzers parameters