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http://dx.doi.org/10.7844/kirr.2018.27.5.9

Calculation of the Activity Coefficients of Ions in Weak Electrolyte Solutions  

Lee, Man-Seung (Department of Advanced Material Science & Engineering, Institute of Rare Metal, Mokpo National University)
Son, Seong Ho (Korea Institute of Industrial Technology, Research Institute of Advanced Manufacturing Technology)
Publication Information
Resources Recycling / v.27, no.5, 2018 , pp. 9-13 More about this Journal
Abstract
The equilibrium constant of a chemical reaction is related to the standard Gibbs free energy change. Since equilibrium constant is defined as the ratio of the activities of the chemical species, it is necessary to consider the non-ideal behavior of the solutes as ionic strength of the solution increases. In this paper, the derivation of Debye-$H{\ddot{u}}ckel$ limiting law and its modification by which the activity coefficient of an ion can be calculated was explained. Moreover, the method to obtain the activity coefficient of an ion from the experimentally determined mean activity coefficients of an electrolyte was explained.
Keywords
Equilibrium constant; electrolyte; activity coefficient; Debye-$H{\ddot{u}}ckel$ law;
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