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    ReputationRep:
    Hey,

    I have a question for some revision I am doing.

    The question comes from a Biology ISA:

    "Why does methylene blue decolourise?"

    I just can't seem to get this question right.

    Does anyone know what the correct answer to this is?

    Thanks
  2. Offline

    ReputationRep:
    (Original post by Crusoe1)
    Hey,

    I have a question for some revision I am doing.

    The question comes from a Biology ISA:

    "Why does methylene blue decolourise?"

    I just can't seem to get this question right.

    Does anyone know what the correct answer to this is?

    Thanks
    Hi, welcome to TSR!

    As far as I know, the decolourisation is to do with a redox process - when methylene blue is reduced by a reducing agent, it becomes colourless, and when it is oxidised by an oxidising agent, it becomes blue again.

    Wiki's always good to have a quick check: http://en.wikipedia.org/wiki/Methylene_blue#Uses
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    ReputationRep:
    Thank you! I looked it up and I kinda figured it out...Thanks again!

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