A POTENTIOMETRIC STUDY OF STABILITY CONSTANT OF TERNARY COMPLEXATION OF SOME METALS

Authors: Farooque Basheer Ansari*1, Mazahar Farooqui2 and S. H. Quadri2

*1Rizvi College of Arts, Science & Commerce, Bandra (W), Mumbai- 400050 (M.S.) India; 2Post Graduate and Research Centre, Maulana Azad College, Aurangabad - 431001 (M.S.) India; *E-mail: Farooqueansari2007@rediffmail.com

pH – metry investigation on the complex formation equilibrium of Ni²⁺, Co²⁺ and Mg²⁺ with Glycine (Gly) and p–amino benzoic acid (p-ABA) or       p-hydroxy benzoic acid (p-HBA) shows the formation of ternary systems. For present work different molar ratios of the metal, primary ligands and secondary ligands are used. The ionic strength of 0.1 Molar was kept constant using NaNO₃. The complex formation equilibrium was elucidated with the help of speciation curves. The glycine and p-ABA or p-HBA with metal shows a order of Ni⁺² < Co⁺² < Mg⁺²

Keywords : Potentiometric Studies, Ternary Complexes, Glycine, p- amino benzoic acid, p-hydroxy benzoic acid, Mixed-Ligand Complexes.