Hydrolytic Behavior of La3+ and Sm3+ at Various Temperatures
| Autor: | Serap Teksöz, Çiğdem İçhedef, Tuba Şişmanoğlu |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Lanthanide
Aqueous medium Chemistry Enthalpy Biophysics 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Biochemistry 0104 chemical sciences Ion Gibbs free energy Metal Hydrolysis symbols.namesake Ionic strength visual_art visual_art.visual_art_medium symbols Physical chemistry Physical and Theoretical Chemistry 0210 nano-technology Molecular Biology |
| Zdroj: | Journal of Solution Chemistry. 47:220-230 |
| ISSN: | 1572-8927 0095-9782 |
| DOI: | 10.1007/s10953-018-0727-y |
| Popis: | The hydrolytic species of lanthanide ions, La3+ and Sm3+, in water at I = 0.1 mol·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 (log10 β) of [La(OH)]2+ and La(OH)3 were calculated as −8.52 ± 0.46, −26.84 ± 0.48, and log10 β 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. |
| Databáze: | OpenAIRE |
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