Chemistry Journal of Moldova

DISTRIBUTION OF SOLUBLE AND INSOLUBLE CHEMICAL SPECIES OF CHROMIUM (III) AND (VI) IN AQUEOUS SOLUTIONS

Author(s):

Oxana Spinu


Field: Ecological chemistry
Type: Research paper
Issue: 2014 Volume 9, no.2
Pages: 19-25
Keywords:

chemical equilibrium, chromium complexes, distribution diagram, Gibbs energy


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Abstract (PDF)

DOI:
dx.doi.org/10.19261/cjm.2014.09(2).03

Graphical Abstract:
 On the basis of currently revised thermodynamic data for Cr(III) and Cr(VI) hydrolysis and photolytic equilibria in addition to original thermodynamic and graphical approach, used in this paper, the repartition of their soluble and insoluble chemical species has been investigated. By means of the diagrams “ΔG – pH”, the areas of thermodynamic stability of chromium(III) hydroxide have been established for a number of the analytical concentration of Cr(III) in heterogeneous mixtures. The obtained calculated results correlate well with existing experimental data.

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