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Hydrogen ion dependence in the oxidation of L-ascorbic acid by hexacyanoferrate(III) in water-alcohol mixture

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Summary

The kinetics of oxidation of L-ascorbic acid (H2A) by [Fe(CN) 3−6 ] have been studied in water-alcohol mixture. The kinetic rate law conforms to the equation

$$ - \tfrac{1}{2}d[Fe(CN)_6^{3 - } ]/dt = \{ k_1 K_1 /[H{}^ + ] + k_2 + k_3 K_3 [H^ + ]\} \cdot [H_2 A]$$

k1K1,k2 and k3K3 were evaluated graphically in regions of different hydrogen ion concentrations and the [H+]min corresponding to minimum rate in rate pH profile was calculated to be in good agreement with the experimental value. The effects of ionic strength, solvent and temperature on the rate of the reaction have also been analyzed and interpreted.

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Authors and Affiliations

  1. Department of Chemistry, University of Rajasthan, 302004, Jaipur, India

    Nidhi Sharma, Amita Agrawal, Som K. Mishra & Prem D. Sharma

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  1. Nidhi Sharma
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  2. Amita Agrawal
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  3. Som K. Mishra
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  4. Prem D. Sharma
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Sharma, N., Agrawal, A., Mishra, S.K. et al. Hydrogen ion dependence in the oxidation of L-ascorbic acid by hexacyanoferrate(III) in water-alcohol mixture. Transition Met. Chem. 17, 181–185 (1992). https://doi.org/10.1007/BF02910832

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  • DOI: https://doi.org/10.1007/BF02910832

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