Organic Solvent Effect, Thermodynamic Study and Synergism Behavior for Extraction Efficiency of Cobalt (II) Complex with 1-[2-Pyridyl Azo] -2-Naphthol

Ibtehaj R. Ali; Shawket. K. Jawad; Fatimah A. Wannas

Authors

Ibtehaj R. Ali
Shawket. K. Jawad
Fatimah A. Wannas

extraction, complexing agent, Synergism study, TBP, MIBK

Abstract

After pinpoint all optimum conditions for extraction Cobalt(II) as ion pair association complex or chleated complex with complexing agent 1-[2-pyridyl azo] -2-naphthol which dimonirtrate λ max for complex extracted was (446nm.) more stable complex formation was at pH= 7 and 60 µg Co(II)/5ml with 1×10 -4 M 1-[2-pyridyl azo] -2-naphthol[PAN] dissolved in chloroform and shaking time 10 minutes. The stoichiometry of complex extracted to the organic phase was 1:1 metal : PAN [Co(PAN) + Cl -] or [Co(PAN)] + (Cl -).Extraction method was endothermic as well as thermodynamic parameters after calculated was ∆H ex = 0.0149 KJmol -, ∆G ex = -58.81 KJ mol -and ∆S ex = 176.55 J mol -. Synergism study show from the slope is appear there is one molecule of TBP or MIBK participated in the structure of complex extracted to the organic phase.

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Organic Solvent Effect, Thermodynamic Study and Synergism Behavior for Extraction Efficiency of Cobalt (II) Complex with 1-[2-Pyridyl Azo] -2-Naphthol. (2016). Global Journal of Science Frontier Research, 16(5), 25-31. https://journalofscience.org/index.php/GJSFR/article/view/

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