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Electrophoretic studies of mixed ligand complexes in solution—copper(II), nickel(II), cobalt(II), uranyl(II) and thorium(IV)—tartarate—nitrilotriacetate

✍ Scribed by J.R. Yadav; J.K. Sircar; K.L. Yadava

Publisher
Elsevier Science
Year
1981
Tongue
English
Weight
257 KB
Volume
26
Category
Article
ISSN
0013-4686

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✦ Synopsis

Paper elcctrophoresis has be&used for the study of the equilibria in mixed l&and complex systems in solution. The method is based on the migration of a spot of a metal ion, with the complexants added in the background electrolyte (0.1 M @-krchloric acid), at a fixed pH. The concentration of one of the complexants [A] is kept constant, while that of second ligand [L] is varied. A graph of-log[L] against mobility is used to obtain information on the formation of the mixed ligand complex, and to calculate the stability constant. Using this technique, the values of overall stability constant of the complex metaltartarate-nitrilotriacetate have been Found to be 1012.25, 10s-9s 105.33, 10-"-56, and lo'-'" for Cu(II). Ni(II). Co(II), UOI(II) and Th(IV) complexes, respectively at fl = 0.i and temp. = 40°C.

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