Add time:08/06/2019         Source:sciencedirect.com

Qualitative tests on the reaction between chromium in its different oxidation states and pure diphenylcarbazide (DPCI), diphenylcarbazone (DPCO), and diphenylcarbadiazone are described. It is shown that the magenta-coloured complex results from the reaction of chromium(III) with diphenylcarbazone. From quantitative measurements, the stoichiometry, the molar absorptivity and the conditional stability constant of the complex were determined. The stoichiometry of the preceding redox reactions, when chromium(VI) interacts with DPCI and chromium(II) with DPCO, was also established. The results confirmed the qualitative findings.

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