Resources on the Blue Bottle Experiment

[CurvyHat]

Hello,

I'm doing a school project on the Blue Bottle Experiment, and I was looking for some equations. I found a nice thread about it on this forum, but all the resources linked in it are inaccessible right now. Moreover, all of the studies I'm seeing online from the Royal Society of Chemistry and others are vague and have no concrete reaction equations. I was wondering where I can find some resources that are specific and contain equations for the reactions.

[ChenBeier]

https://www.google.com/search?q=blue%20 ... vM&vssid=l

[CurvyHat]

Yes, I used google, but all of the studies I found online were vague and didn't contain concrete chemical equations. What I'm looking for is something along the lines of the resources referenced in this thread: chemicalforum.webqc org/viewtopic.php?t=4457

[ChenBeier]

Did you check my link. The first two hits already show the reaction.

https://www.chemie.uni-wuerzburg.de/fil ... ersuch.pdf

https://www.researchgate.net/figure/The ... _320949299

[CurvyHat]

Yes, I did. Sorry, I guess we had different search results show up, because this is what showed up on my screen:

Screenshot 2024-12-11 17.38.00.png

. Thank you!

[ChenBeier]

Of course you have click the links to go deeper .

[CurvyHat]

I'm still slightly confused. The first link says that glucose is oxidized, but its oxidation number goes from 0 to -1. Wouldn't that make it reduced?

[ChenBeier]

I can not find what you talking about.
Which link you refer to,

[CurvyHat]

The German link. It seems as though the charge on glucose goes from neutral to -1. Wouldn't that make the glucose reduced?

[ChenBeier]

The Glucose is a aldehyd this will oxidised to gluconate in alcaline condition.

R-CHO + 3 OH- => R-COO- + 2 H₂O + 2e-

Oxidation C in Aldehyde + 1 to +3 in gluconate

In the link the equation is not correct because they use OH- on reactant side and H+ (H₃O+) on product side.

R-CHO + OH- => R-COO- + 2 H₃O+ + 2e-

[CurvyHat]

Is there a source that gives the equation R-CHO + 3 OH- => R-COO- + 2 H₂O + 2e- besides the earlier thread I linked? I would prefer not to cite a forum thread.

[ChenBeier]

Can be found here

https://www.chemguide.co.uk/organicprop ... ation.html