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Author: Subject: Chevreul's Salt.
DraconicAcid
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[*] posted on 14-4-2016 at 08:21


Quote: Originally posted by Chemist_Cup_Noodles  
I think it would be beneficial to perform a recrystallization of this fascinating salt. I have already thrown some pretty good polar solvents at it, and I wasn't very hopeful they would work at all but it was all that I have. I'm sure maybe toluene or xylene would do the trick. I haven't seen any data at all on this salt's solubility so maybe it's up to us to generate it.


It's a salt, and you think it will dissolve in toluene? Good luck.

Acetonitrile *might* work, but you may not get the original salt back.




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Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
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[*] posted on 14-4-2016 at 08:43


http://chem.pieceofscience.com/?p=988
This is my article about chevruls salt, if I would ever succesfully recrystalize it, I'll add it to the article.




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The Volatile Chemist
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[*] posted on 15-4-2016 at 15:20


Just curious, has DMSO ever been tried? Sorry, I don't know my solvents too well...



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[*] posted on 11-2-2017 at 14:24


Just to add on a little bit here.. I recently preformed the experiment outlined by Mrhomescientist (http://thehomescientist.blogspot.com/2013/10/chevruels-salt....) but did so with 3x the reagents. After mixing the two solutions I decided to heat a large amount of it, and finish the experiment outlined above, but a small amount of it I decided to try and produce the salt with a slow evaporation. (I also wanted to see if it affected the crystal size)




While the slow evaporation DID work, it took quite a long time, and many impurities remained in the evaporation dish (most of which were unreacted reagents). The crystal size didn't increase any significant amount.
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MrHomeScientist
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[*] posted on 13-2-2017 at 07:02


Interesting! Glad the experiment worked for you. Woelen was able to make slightly larger crystals on his site: http://woelen.homescience.net/science/chem/exps/copper_sulfi...
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