Muzz1969
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Post reaction separation
I have been fooling around with electrolysis cells lately and have been oxidising primary alcohols with Br2. After distilling most of the bromine off
post reaction, I am still left with a tinge of yellow in the solution. My question is what would be the best way to precipitate the rest of the Br out
of the solution. I have been oxidising ethanol and methanol so far.
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gdflp
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The standard way of removing traces of bromine is to add a reducing agent such as sodium metabisulfite, sodium thiosulfate, sodium sulfite, etc. The
one I've seen used most commonly is metabisulfite.
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Muzz1969
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Quote: Originally posted by gdflp  | | The standard way of removing traces of bromine is to add a reducing agent such as sodium metabisulfite, sodium thiosulfate, sodium sulfite, etc. The
one I've seen used most commonly is metabisulfite. |
So would that precipitate into sodium bromide or sodium bromate
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gdflp
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Sodium bromide, 2Na2S2O5 + Br2 --> 2NaBr + Na2SO4 + 3SO2
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blogfast25
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Oxidising them to what?
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Muzz1969
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Ethanoic acid , it is usually done in solution with dichromate but I'm fooling around with a cell and other metals such as bromine to see what
happens.
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blogfast25
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| Quote: Originally posted by Muzz1969 | | Ethanoic acid , it is usually done in solution with dichromate but I'm fooling around with a cell and other metals such as bromine to see what
happens. |
Metals such as bromine?
Oxidising ethanol to ethanoic acid with bromine? Bromine is unlikely to have anything near the oxidising power needed for that oxidation.
So maybe that's where the 'fooling around with a cell' comes into it. Explain?
[Edited on 1-2-2015 by blogfast25]
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Muzz1969
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@ blogfast ....as I said I'm fooling around with only my instinct and what I read to guide me. I start uni in a few weeks so my formal learning will
start there. I am really interested in electrochem and have started building a few different cells in different configurations to see what produces
better results for organic reactions. The only chemicals I can get my hands on at the moment is ethanol, methanol and tetrahydrafuran so I started
playing with the ethanol. Of course any input to guide me in electrochemical reactions would be appreciated.
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