Determination of the composition and stability constants of complexes in Co (II) - malic acid system
This paper presents the results of spectrophotometric and pH-metric study of Co (II) - malic acid system. Optical density of solutions was determined spectrophotometrically in a wide wavelength range at constant ionic strength and pH values. The compositions of the complexes formed in the system were determined. The results obtained are confirmed by pH titration. It was shown that the stability of complexes varies in the row: Co (II): H3Mt = 1:2 <1:1 < 2:1.
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