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Vol. 29 No. 12 (2017): Vol 29 Issue 12

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Reductometric Titration and Quantum Chemical Study of Oxalohydroxamic Acid for Determination of Manganese in Ores and Alloys

https://doi.org/10.14233/ajchem.2017.20719
Sonalika Agrawal
Department of Chemistry, National Institute of Technology, Raipur-492 010, India
Fahmida Khan
Department of Chemistry, National Institute of Technology, Raipur-492 010, India
Dakeshwar Kumar Verma
Department of Chemistry, VEC Lakhanpur, Sarguja University Ambikapur-497 116, India
Rakesh Kumar Sahu
Department of Chemistry, National Institute of Technology, Raipur-492 010, India

Corresponding Author(s) : Dakeshwar Kumar Verma

dakeshwarverma@gmail.com

Asian Journal of Chemistry, Vol. 29 No. 12 (2017): Vol 29 Issue 12

Abstract

Oxalohydroxamic acid has been employed as a reductometric titrant for the determination of manganese in 2 N sulphuric acid. Stoichiometry of the reaction is established. One mole of oxalohydroxamic acid was found to consume 12 equivalents of KMnO4. The titre values are obtained by second derivative plots of potentiometric titrations. The effect of diverse ions, temperature, time, sulphuric acid concentration and concentration of reacting substances on the stoichiometry of the reaction were studied. The results obtained are reproducible. This study also presents molecular orbital/density functional theory (MO/DFT) for calculations of the electronic structure and reducing property of oxalohydroxamic acid for metal determination. A good agreement is found between the predicted properties of oxalohydroxamic acid and experimental and theoretical results.

Keywords

Stoichiometry Second derivative plot Equivalents of oxidant Density functional theory
Agrawal, S., Khan, F., Verma, D. K., & Sahu, R. K. (2017). Reductometric Titration and Quantum Chemical Study of Oxalohydroxamic Acid for Determination of Manganese in Ores and Alloys. Asian Journal of Chemistry, 29(12), 2592–2596. https://doi.org/10.14233/ajchem.2017.20719
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