Potentiometric Study of some Ternary Complexes of Gallium(III)
Journal Title:INTERNATIONAL RESEARCH JOURNAL OF SCIENCE AND ENGINEERING
Modified form of Irving Rossotti’s pH titration technique has been employed to investigate mixed ligand complex formation tendency of Ga (III) with Thioglycolic acid as a primary ligand and Malonic acid ,Fumaric acid, Itaconic acid, Malic acid and Tartaric acid as secondary ligands. The study was carried out at three different temperatures, 250C, 350C and 450C.The thermodynamic parameters viz. ?G, ?H and ?S have been evaluated. The ?G and ?H values have been further separated into their electrostatic components ?Ge, ?He and cratic components ?Gc and ?Hc. Effect of change in dielectric constant and change in ionic strength have been studied on these systems. The results were correlated on the basis of steric and structural characteristics of the chelate formed.