Abstract
The CrVI oxidation of HgI in an aqueous acid medium occurs to a modest extent only in presence of PdII and in H2SO4 above ca. 0.20 mol dm−3. The reaction is first order in [CrVI] in the presence of PdII catalyst. The order in [HgI] is less than unity, whereas that in [PdII] is unity. Increase in [H2SO4] accelerates the reaction rate. The added products, CrIII and HgII, do not significantly effect the reaction rate. A mechanism involving HCrO4 − and PdCl+ as the reactive species of oxidant and catalyst respectively, is proposed. The reaction constants involved in the mechanism have been evaluated.
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Chimatadar, S.A., Koujalagi, S.B. & Nandibewoor, S.T. Kinetics and mechanism of palladium(II) catalyzed chromium(VI) oxidation of mercury(I) in aqueous sulphuric acid. Transition Metal Chemistry 26, 662–667 (2001). https://doi.org/10.1023/A:1012019626879
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DOI: https://doi.org/10.1023/A:1012019626879