Author Topic: Acid Base extraction goes wrong  (Read 544 times)

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OcoteaCymbarum

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Acid Base extraction goes wrong
« on: August 16, 2003, 11:18:00 AM »
I am a little confused as too what happened today and was wondering if anybody had an idea or advice about my problem.

Did the Round Bottom's write up for the second time.
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(RoundBottom: "Os/BS AlHg MeAm Amination writeup", Methods Discourse)
Extracted everything in Xylene.
Then I did 3 washes with 5% NaOH. Extracted with about 250-300 ml of HCl 10%

The Water layer changed to pink with the first extraction and clear with the second. The colors were the same on my first try.

So I wash my water layer with Non-polar. So I decide to boil down the water a bit before bringing the pH back up to 12-13. The solution became very dark with a green film running the sides of the erlen.
Let the solution cool then I added some strong NaOh solution slowly. After adding a couple of mls, some reddish crap thats really sticky preciptated. I dont have a clue what just happened. It's the first time it does that and I havent changed any chemicals,solvents, etc.

Does anybody have a clue?

Rhodium

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Writeup about what? Please include links.
« Reply #1 on: August 16, 2003, 01:19:00 PM »
Did the Round Bottom's write up for the second time.

Writeup about what? Please include links.