화학공학소재연구정보센터
Journal of Chemical Thermodynamics, Vol.78, 37-42, 2014
Solubility increase of colloidal zinc hydroxide as revealed by isothermal titration calorimetry
In this study, association between zinc (II) and dipicolylamine was studied by isothermal titration calorimetry. At neutral of weakly alkaline conditions, with zinc (II) in cell and dipicolylamine in syringe, increasing heat release was observed as the titration proceeded. Considering the equilibrium between Zn2+ and Zn(OH)(2) at these conditions, the increasing heat release is ascribed to the increasing solubilization of colloidal Zn(OH)(2) followed by neutralization of OH- by the buffer. Though quantitative determination of the increase in solubility is not accomplished, to the best of our knowledge, this is the first report about solubility increase of colloidal zinc hydroxide using calorimetric method. (C) 2014 Elsevier Ltd. All rights reserved.