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International Letters of Chemistry, Physics and Astronomy
Volume 64

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Stability Constant of Rare Earth Metals with Substituted Thiazoles at 298.15K

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Abstract:

The stability constant on complexation of rare earth metal ions Eu (III), Gd (III), Nd (III) and Tb (III) with substituted thiazole in 70% Dioxane (Dx)-water mixture have been determined by a pH and spectrophotometric method at 298.15K and ionic strength 0.1mol.dm-3 (sodium perchlorate). At constant temperature, the stability constant of the formed complexes decreases in the order Tb (III), Gd (III), Eu (III), Nd (III). The dissociation process is non-spontaneous, endothermic and entrophically unfavorable while formation of metal complexes has been found to be spontaneous, endothermic and entrophically favorable.

Info:

Periodical:
International Letters of Chemistry, Physics and Astronomy (Volume 64)
Pages:
106-109
DOI:
10.18052/www.scipress.com/ILCPA.64.106
Citation:
A.B. Naik and M.S. Poharkar, "Stability Constant of Rare Earth Metals with Substituted Thiazoles at 298.15K", International Letters of Chemistry, Physics and Astronomy, Vol. 64, pp. 106-109, 2016
Online since:
Feb 2016
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