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Abstract
The differential pulse polarography was used to study the mixed ligand complexes of imidazole and some dicarboxylate anions namely, oxalate, tartrate and malonate with Cd(II) at. constant ionic strength (μ=1, NaNO3) at 25 + 0.1°C. It has been found that the reduction of complexes is reversible and diffusion-controlled. Three mixed complexes are formed with malonate (or oxalate) whereas four mixed complexes are formed with tartrate. The overall stability constants for each system were calculated and discussed.