Ionic Strength dependence of Formation Constants: Complexation of Cobalt(II) With thiazolyl blue formazan in a Non-Ionic Micellar Medium

Autor: Majid Amiri, Majid Mohammadhosseini, Behzad Behzad
Jazyk: English<br />Persian
Rok vydání: 2010
Předmět:
Zdroj: شیمی کاربردی روز, Vol 5, Iss 14, Pp 41-50 (2010)
Druh dokumentu: article
ISSN: 2981-2437
DOI: 10.22075/chem.2017.568
Popis: This paper describes the complexation of cobalt(II) with thiazolyl blue formazan in a micellar medium at the pH range 3 to10, using Spectrophotometric techniques. The influences of pH and surfactant amount have been also tested. The composition of the complex was determined by the continuous variation (Jobmethod) and mole-ratio methods. It was concluded that Co2+ forms a mononuclear 2:1 complex with thiazolyl blue formazan of the type CoL2- at pH = 6. Finally, the formation constants of the complex were evaluated at 25 ºC under ionic strengths ranging from 0.1 to 1 mol dm-3 of potassium nitrate.
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