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    Suitable indicators for redox titrations

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    Methylene blue and diphenylbenzidine sulfonic acid are redox indicators that turn from colorless in the reduced state to blue (Methylene blue) or violet (Diphenylbenzidine sulfonic acid) in the oxidized state. Indicate whether each is a suitable indicator for the following redox titrations.

    a. Reduction of Fe3 by Sn2 in 1M HCl.

    Methylene blue: Suitable or unsuitable?
    Diphenylbenzidene: Suitable or unsuitable?

    b. Reduction of Ce4 by Fe2 in 1M HCl.

    Methylene blue: Suitable or unsuitable?
    Diphenylbenzidene: Suitable or unsuitable?

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    https://brainmass.com/chemistry/redox-reactions/suitable-indicators-redox-titrations-530443

    Solution Summary

    This solution offers logical discussion and conclusion pertained to the suitability of redox indicators in question. This solution clarifies the concepts from the basics and will be helpful for better understanding of similar problems.

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