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Information Journal Paper

Title

KINETICS AND MECHANISM OF THE OXIDATION OF A FERROUS COMPLEX WITH AN α,α'-DIIMINE CHELATE LIGAND BY CERIC SULFATE IN AQUEOUS ACIDIC MEDIUM BY UV-VIS ABSORPTION SPECTROSCOPY

Pages

  631-640

Keywords

TRIS (2 
2'-BIPYRIDINE) IRON (II) SULFATE 

Abstract

 Kinetics of the oxidation of tris (2,2'-bipyridine) iron (II) sulfate by ceric sulfate was spectrophotometrically studied in an aqueous sulfuric acid medium. Different methods, including isolation, integration and half-life, were employed to determine the reaction order. The REDOX REACTION was found to be first-order with respect to the reductant, tris (2,2'-bipyridine) iron (II) sulfate, and the oxidant, ceric sulfate. Complex kinetics was observed with an increase in the initial concentration of the oxidant. The influence of the dielectric constant, [H+] and [SO42-] on the rate was also investigated. The increase in the dielectric constant and H+ ion concentration of the medium retard the rate, while an increase in the SO42- ion concentration first accelerates the rate, and then retards the reaction. The effect of each factor, i.e., the dielectric constant, H+ ions and SO42- ions, suggests that Ce (SO4)32- is the active species of cerium (IV). A rate law consistent with the observed kinetic data and the proposed mechanism is suggested to be:-d [Fe (bipy)32+/dt=kK1Kd [Fe (bipy)32+] [CeW]t [SO42-]a/Kd2+Ki [SO42-]a

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  • Cite

    APA: Copy

    KHATTAK, R., IMAM NAQVI, I., & AKHYAR FARRUKH, M.. (2008). KINETICS AND MECHANISM OF THE OXIDATION OF A FERROUS COMPLEX WITH AN α,α'-DIIMINE CHELATE LIGAND BY CERIC SULFATE IN AQUEOUS ACIDIC MEDIUM BY UV-VIS ABSORPTION SPECTROSCOPY. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY(JICS), 5(4), 631-640. SID. https://sid.ir/paper/282260/en

    Vancouver: Copy

    KHATTAK R., IMAM NAQVI I., AKHYAR FARRUKH M.. KINETICS AND MECHANISM OF THE OXIDATION OF A FERROUS COMPLEX WITH AN α,α'-DIIMINE CHELATE LIGAND BY CERIC SULFATE IN AQUEOUS ACIDIC MEDIUM BY UV-VIS ABSORPTION SPECTROSCOPY. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY(JICS)[Internet]. 2008;5(4):631-640. Available from: https://sid.ir/paper/282260/en

    IEEE: Copy

    R. KHATTAK, I. IMAM NAQVI, and M. AKHYAR FARRUKH, “KINETICS AND MECHANISM OF THE OXIDATION OF A FERROUS COMPLEX WITH AN α,α'-DIIMINE CHELATE LIGAND BY CERIC SULFATE IN AQUEOUS ACIDIC MEDIUM BY UV-VIS ABSORPTION SPECTROSCOPY,” JOURNAL OF THE IRANIAN CHEMICAL SOCIETY(JICS), vol. 5, no. 4, pp. 631–640, 2008, [Online]. Available: https://sid.ir/paper/282260/en

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