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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 2    No. 4    November 1992

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RELATIONSHIPS BETWEEN IONIC RADII AND PITZER'S PARAMETERS IN 1:1 TYPE ELECTROLYTE SOLUTIONS
Sun Weian1, Li Yigui2, Chen Xinmin2

1.Shenzhen Uninversity, Shenzhen 518060, China;  
2.Qinghua University, Being 100084, China;
3.Central South University of Technology, Changsha 410083, China

Abstract:A new expression for the osmotic and activity coefFcients in single electrolyte solution is developed by reforming the Pitzer's osmotic equation. As a result, the correlations between the aMx, the sum of the " hard core" radii of ions M+ and X-, and the second virial coefficients βMX(0) and βMX(1) in Pitzer's equations are obtained.Furthermore, an "ionic overlap" model and its relevant equation are suggested. The relationships between the thermodynamic properties of aqueous electrolytes and the characteristic of their ions (ionic radii and ionic hydration) are discussed quantitatively.

 

Key words: Pitzer  virial parameter  osmotic coefficient  activity coefficient  electrolytic solution  ionic radius

ISSN 1672-7029
CN 43-1423/U

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