Laboratory Experiment

    Reaction of FD&C Blue 1 with Sodium Percarbonate: Multiple Kinetics Methods Using an Inexpensive Light Meter
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    Journal of Chemical Education

    Cite this: J. Chem. Educ. 2019, 96, 7, 1453–1457
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    https://doi.org/10.1021/acs.jchemed.8b00589
    Published June 19, 2019
    Copyright © 2019 American Chemical Society and Division of Chemical Education, Inc.

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    Abstract

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    In selecting from a repertoire of traditional kinetics experiments, an instructor often has to choose among having students gain experience with the graphical method, the method of initial rates, or a temperature-dependent experiment in which students construct an Arrhenius plot. This paper presents an environmentally friendly bleaching reaction between the dye FD&C Blue 1 and a nonchlorinated bleach alternative, sodium percarbonate, which goes to completion within 15 min and can be monitored with an inexpensive light meter. The fast time scale of the reaction allows students to use the graphical method along with the method of initial rates to determine the overall rate law, as well as collect data for an Arrhenius plot, potentially within a 3 h laboratory period. Students can generate an Arrhenius plot quickly and inexpensively by detecting the extent of reaction in a beaker using a desk lamp, filter, and light meter, eliminating the need for spectrophotometer access, a jacketed cell, and a heated circulating bath. Performing all three types of kinetics experiments with one simple reaction in one or two laboratory periods allows students to see how the methods are interrelated and complementary.

    Copyright © 2019 American Chemical Society and Division of Chemical Education, Inc.

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    Journal of Chemical Education

    Cite this: J. Chem. Educ. 2019, 96, 7, 1453–1457
    Click to copy citationCitation copied!
    https://doi.org/10.1021/acs.jchemed.8b00589
    Published June 19, 2019
    Copyright © 2019 American Chemical Society and Division of Chemical Education, Inc.

    Article Views

    4663

    Altmetric

    2

    Citations

    Learn about these metrics

    Article Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.

    Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.

    The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated.