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The interaction of Cu (II) metal ion complex with Rubeanic acid has been studied at various ionic strengths P H - metrically. The values of Pk (Proton - Ligand stability constant) and log k (Metal - Ligand stability constant) are utilised to estimate the thermodynamic stability constant at zero ionic strength and to know the exact nature of complexation equilibria. Pk/log k values are found to be increasing with decreasing the values of ionic strengths.

Studies of Influence of Ionic strengths of Cu (II) metal ion complex with Rubeanic acid by P H - metric technique