ISSN : 0970 - 020X, ONLINE ISSN : 2231-5039
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Potentiometric Study of Quarternary Complexes of Some Rare Earth Metals

Volume 20, Number 2

Mahesh Pal Singh

Department of Chemistry, Agra College, Agra- 282 005 (India)

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ABSTRACT:

Potentiometric studies have been carried out on metal chelates of Pr3+, Nd3+, Gd3+ and Dy3+ with N-hydroxyethyl ethylene diamine triacetic acid (HEDTA), thiophene-2-carboxylic acid (TCA), furan-2-carboxylic acid (FCA), pyridine-2, 6-dicarboxylic acid (PDA) and phthalic acid (PA). The dissociation constants of used ligands, stability constants and free energy change have been determined by pH-titration technique at 40±1°C and at an ionic strength of 0.1 M KNO3. The relative order of stability has been observed to be Pr(III)

KEYWORDS:

Potentiometric study; Quaternary complexes; Rare earths

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Singh M. P. Potentiometric Study of Quarternary Complexes of Some Rare Earth Metals. Orient J Chem 2004;20(2).

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Singh M. P. Potentiometric Study of Quarternary Complexes of Some Rare Earth Metals. Orient J Chem 2004;20(2). Available from: http://www.orientjchem.org/?p=18703


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