[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

[thegodofgod]

(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

[Crusoe1]

Thank you! I looked it up and I kinda figured it out...Thanks again!