Activity of water in the KI+KNO3+H2Oternary system at 298.15 K

被引：16

作者：

Galleguillos, HR

Graber, TA

Taboada, ME

Hernández-Luis, FF

机构：

[1] Univ Antofagasta, Dept Ingn Quim, Antofagasta, Chile

[2] Univ La Laguna, Dept Quim Fis, E-38207 San Cristobal la Laguna, Tenerife, Spain

来源：

JOURNAL OF CHEMICAL AND ENGINEERING DATA | 2003年 / 48卷 / 04期

关键词：

D O I：

10.1021/je020164q

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The activities of water in the KI + KNO3 + H2O System were determined with an electronic hydrometer. The experimental study was carried out at 298.15 K and constant ionic strengths of 2.0, 2.5, and 3.0 mol.kg(-1). Different ionic strength fractions of KNO3, y(B) = M-B/(M-A + M-B), were studied for each ionic strength. The experimental values were fit to three thermodynamic models (Pitzer, Scatchard, Lim); each of these models required only two fitted parameters in order to obtain deviations within experimental uncertainty. In addition, mean ionic activity coefficients were determined for KI and KNO3 as well as the Gibbs excess energy of mixing.

引用

页码：851 / 855

页数：5

共 22 条

[1]

[Anonymous], 1991, ACTIVITY COEFFICIENT, DOI DOI 10.1201/9781351069472

[2]

Dean JA., 1992, Lange's handbook of chemistry

[3]

GUERRERO C, 1999, INFORMACION TECNOLOG, V10, P25

[4] THE PREDICTION OF MINERAL SOLUBILITIES IN NATURAL-WATERS - THE NA-K-MG-CA-H-CL-SO4-OH-HCO3-CO3-CO2-H2O SYSTEM TO HIGH IONIC STRENGTHS AT 25-DEGREES-C [J].