Kinetics-Based Indirect Spectrophotometric Method for Simultaneous Determination of MnO4 (-) and Cr207 (2-): A Modern Instrumental Analysis Laboratory Experiment

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Article on kinetics-based indirect spectrophotometric method for simultaneous determination of MnO4 (-) and Cr2O7 (2-) and a modern instrumental analysis laboratory experiment.

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3 p.

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Pandey, Siddharth; McHale, Mary E. R.; Horton, Ann-Sofi M.; Padilla, Sandra A.; Trufant, Ashantè L.; De La Sancha, Noé U. et al. April 1, 1998.

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Article on kinetics-based indirect spectrophotometric method for simultaneous determination of MnO4 (-) and Cr2O7 (2-) and a modern instrumental analysis laboratory experiment.

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3 p.

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Abstract: An indirect kinetics-based spectrophotometric method is developed for the simultaneous quantitative determination of permanganate and dichromate ion concentrations in an unknown. The method is based upon differences in reaction times between pyrogallol red and the two analytes. Oxidation of pyrogallol red (PGR) by permanganate ion is rapid, whereas oxidation of PGR by the dichromate ion is much slower. From changes in the measured absorbances after 3-and 8-minute reaction times, the molar concentrations of the permanganate and dichromate ions are determined.

Reprinted with permission from the Journal of Chemical Education. Copyright 1998 American Chemical Society.

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  • Journal of Chemical Education, 75(4), American Chemical Society, April 1, 1998, pp. 1-3

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  • Publication Title: Journal of Chemical Education
  • Volume: 75
  • Issue: 4
  • Page Start: 450
  • Page End: 452
  • Peer Reviewed: Yes

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  • April 1, 1998

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  • July 9, 2015, 6:19 a.m.

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  • Dec. 7, 2023, 10:31 a.m.

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Pandey, Siddharth; McHale, Mary E. R.; Horton, Ann-Sofi M.; Padilla, Sandra A.; Trufant, Ashantè L.; De La Sancha, Noé U. et al. Kinetics-Based Indirect Spectrophotometric Method for Simultaneous Determination of MnO4 (-) and Cr207 (2-): A Modern Instrumental Analysis Laboratory Experiment, article, April 1, 1998; [Washington, D.C.]. (https://digital.library.unt.edu/ark:/67531/metadc674087/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT College of Arts and Sciences.

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