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The influence of sodium chloride on the driving force of the crystallization of potassium chloride from aqueous solutions at 25 °C
Author(s) -
König Ax.,
Emons H.H.,
Nývlt J.
Publication year - 1987
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170220105
Subject(s) - molality , crystallization , osmotic coefficient , potassium , aqueous solution , chemistry , sodium , ionic strength , kinetic energy , thermodynamics , enthalpy , ionic bonding , inorganic chemistry , chemical engineering , activity coefficient , ion , organic chemistry , physics , classical mechanics , engineering
Admixtures at higher concentrations affect the growth rate in two kinds by changing the kinetic phenomena and also the driving force. Based on measurements of the osmotic coefficient as a function of the total ionic strength of the solution at 25 °C different kinds of driving force are calculated. Usefull for the discussion of the admixture problem is the mean molal free enthalpy of crystallization. NaCl increases the driving force of the crystallization of KCl. It shows that the reason for the decreasing effect of NaCl in growth rate is a kinetic one.