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Redox reaction, changing a solution from yellow to blue

by future_vet
Tags: blue, reaction, redox, solution, yellow
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future_vet
#1
Nov9-06, 10:13 AM
P: 169
Hello,

Today, we saw an experiment where an unknown yellow solution became dark blue while it was being shaken.

I have an explanation for it, but would like your opinion as well:

We had a redox reaction, with the oxidation of glucose (being the reducing agent) by NaOH (being the oxidizing agent). The solution had methylene blue to speed up the reaction, causing the liquid to become blue upon shaking (the shaking increased the presence of oxygen, also speeding up the reaction).

Would that be a good answer, or am I missing something?

Thank you,

J.
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physics girl phd
#2
Nov9-06, 07:58 PM
physics girl phd's Avatar
P: 936
The methylene blue is being oxidized/reduced too...
looking up "methylene blue" or "blue bottle reaction" on www.google.com gave me this:

http://chemed.chem.purdue.edu/demos/...eets/19.1.html
future_vet
#3
Nov10-06, 07:47 AM
P: 169
Thank you!


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