Hydrolytic Behavior of La3+ and Sm3+ at Various Temperatures

被引：16

作者：

Ichedef, Cigdem ^{[1
]}

Sismanoglu, Tuba ^{[2
]}

Teksoz, Serap ^{[1
]}

机构：

[1] Ege Univ, Inst Nucl Sci, TR-35100 Izmir, Turkey

[2] Istanbul Univ, Fac Engn, Dept Chem, Avcilar Campus, TR-34850 Istanbul, Turkey

来源：

JOURNAL OF SOLUTION CHEMISTRY | 2018年 / 47卷 / 02期

关键词：

Lanthanides; Potentiometry; Hydrolysis contants; HYPERQUAD; CHEMICAL SPECIATION; AMINO-ACIDS; COMPLEXES; CONSTANTS; IONS; EQUILIBRIA; STABILITY; PROGRAM; BINARY;

D O I：

10.1007/s10953-018-0727-y

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The hydrolytic species of lanthanide ions, La3+ and Sm3+, in water at I = 0.1 mol center dot dm(-3) KCl ionic strength and temperatures of 298.15, 310.15 and 318.15 K were investigated by potentiometry. The hydrolytic species were modeled by the HySS simulation program. From the results, the hydrolytic species of each metal ion at different temperatures were calculated using the program HYPERQUAD2013. The hydrolysis constants (log(10) beta) of [La(OH)](2+) and La(OH)(3) were calculated as -8.52 +/- 0.46, -26.84 +/- 0.48, and log(10) beta values of [Sm(OH)](2+), [Sm(OH)(2)](+), Sm(OH)(3) were calculated as -7.11 +/- 0.21, -15.84 +/- 0.25 and -23.44 +/- 0.52 in aqueous media at 298.15 K, respectively. The dependence of the hydrolysis constants on the temperature allowed us to calculate the enthalpy, entropy, and Gibbs energy of hydrolysis values of each species.

引用

页码：220 / 230

页数：11

共 19 条

[1] Hyperquad simulation and speciation (HySS): a utility program for the investigation of equilibria involving soluble and partially soluble species [J].