IJSTR >> Volume 9 - Issue 3, March 2020 Edition

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AUTHOR(S)

K.Kavitha

KEYWORDS

Cobalt (II), Glycine, Potassium Ferricyanide, Potentiometry, Redox Reactions.

ABSTRACT

,Rapid and precise redox titration of cobalt (II) with potassium hexacyanoferrate (II) in the presence of glycine in alkaline medium is described. The strategy depends on the influence of glycine on the oxidation – reduction potential of cobalt ions in which it frames progressively stable complex with cobalt (III) than with cobalt (II) and the reaction has been studied by potentiometry as a function of pH and the concentration of glycine and cobalt. During the investigation it was found that the compound of divalent cobalt is stable at pH 7.0-10.0 in the presence of glycine, while the titration was impossible without glycine. The exactness and precision of the strategy was evaluated by the use of lack-of-fit test and other statistical techniques.

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