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...N y a d m o i c r s e guerdouh and barkat j thermodyn catal h t f doi journal of al nruoj sisyl thermodynamics catalysis issn research article open access solvent effects on the extraction copper ii with lauric acid laboratory chemical molecular environment department industrial chemistry faculty science technology biskra university algeria abstract from nitrate medium hl at is studied as function various parameters ph concentration nature using polar nonpolar solvents are treated extracted species differs to cul for cyclohexane dichloromethane toluene or chloroform octanol methyl isobutyl ketone constants percentage free energy g also calculated different keywords equilibrium state was min aqueous phase adjusted by adding necessary amount naoh then after introduction two phases were separated completely gravity concentrations metal remaining in determined system one effective techniques used photometrically nm philips uv vis sp separation cations solutions it ion organic suitable meth...