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Determination of stability constants of the NiCO3 0, ZnCO3 0, and CdCO3 0 complexes using solubilities of corresponding metal carbonates in aqueous solutions

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Abstract

The solubilities of NiCO3, ZnCO3, and CdCO3 in NaClO4–NaHCO3–Na2CO3 solutions are studied experimentally at 25°C and ionic strength of 0.1. The resulting data are used to determine the concentration stability constants of NiCO3 0, ZnCO3 0, and CdCO3 0 complexes in aqueous solutions (they are equal to 810, 12700, and 17900, respectively; log \(K'_{MCO_3^0 } \) = 2.90 ± 0.14, 4.10 ± 0.20, and 4.25 ± 0.04) and to calculate their thermodynamic values (6.45 × 103, 1.01 × 105, and 1.43 × 105, respectively). The logarithms of stability constants of carbonate complexes are found to be inversely dependent on the solubility products of their metal carbonates.

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Authors and Affiliations

  1. Moscow State University, Moscow, 119991, Russia

    A. V. Savenko & V. S. Savenko

Authors
  1. A. V. Savenko
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  2. V. S. Savenko
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Correspondence to A. V. Savenko.

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Original Russian Text © A.V. Savenko, V.S. Savenko, 2017, published in Zhurnal Neorganicheskoi Khimii, 2017, Vol. 62, No. 5, pp. 685–688.

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Savenko, A.V., Savenko, V.S. Determination of stability constants of the NiCO3 0, ZnCO3 0, and CdCO3 0 complexes using solubilities of corresponding metal carbonates in aqueous solutions. Russ. J. Inorg. Chem. 62, 679–682 (2017). https://doi.org/10.1134/S0036023617050205

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  • DOI: https://doi.org/10.1134/S0036023617050205

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