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Ionic Equilibria in $ZnSO_4-Na_2SO_4-H_2SO_4-NaOH-H_2O$ System  

이만승 (목포대학교 공과대학 신소재공학과)
박현주 (목포대학교 공과대학 환경공학과)
나춘기 (목포대학교 공과대학 환경공학과)
Publication Information
Resources Recycling / v.11, no.1, 2002 , pp. 19-25 More about this Journal
Abstract
For $ZnSO_4$-$Na_2$$SO_4$-$H_2$ $SO_4$-$NaOH-H_2$O system, pH of solutions with different electrolyte concentrations was measured at $25^{\circ}C$ and ionic equilibria were analyzed by using K-value method. Activity of water and activity coefficients of solutes were calculated by Pitzer equation. The equilibrium concentration and activity coefficients of solutes were calculated from initial experimental conditions. At high ionic strength of 4m, the pH values calculated were in good agreement with those measured. In the experimental ranges of ionic strength of solution from 3.5 to 4.3 m, the mean activity coefcient of $ZnSO_4$calculated agreed well with those obtained from literature.
Keywords
$ZnSO_4$; ionic equilibria; K-value; Pitzer; pH;
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