A Semi-empirical Equation for Activity Coefficients of Ions with One Parameter

Bulletin of the Korean chemical society

Ihnsup Han¹  Jai-Yeop Lee¹ 

关键词: Debye-Hückel equation;    Activity coefficient;    Semi-empirical equation;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

Based on the Debye-Hückel equation, a semi-empirical equation for activity coefficients was derived through empirical and theoretical trial and error efforts. The obtained equation included two parameters: the proportional factor and the effective radius of an ionic sphere. These parameters were used in the empirical and regression parameter fitting of the calculated values to the experimental results. The activity coefficients calculated from the equation agreed with the data. Transforming to a semi-empirical form, the equation was expressed with one parameter, the ion radius. The ion radius, α, was divided into three parameters, αcation, αanion and δcation, representing parameters for the cation, anion and combination, respectively. The advantage of this equation is the ability to propose a semi-empirical equation that can easily determine the activity coefficient with just one parameter, so the equation is expected to be used more widely in actual industry applications.

【 授权许可】

Unknown