Abstract
The kinetics of the reaction between alkaline ferricyanide and mandelic acid catalysed by [Os (VIII) ] has beeen studied. The rate of ferricyanide disappearance was found to be proportional to the concentration of mandelate ion and Os (VIII), but independent of the concentration of ferricyanide. Within a limited concentration range of hydroxyl ion [ [OH-1] < 0.25 M] the rate varies directly as the [OH⁻]. Effects of SO4 -2, ΝO3 -1NO3 -1 and temperature on the rate were studied. ΔΕ, PZ, AS* etc. were evaluated. Mechanism of oxidation of mandelic acid based on the formation of Os (VIII) acid anion complex is suggested.
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