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Ramium
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Bromide to bromine???
I know the if you oxidise iodide it turns to iodine
Can i oxidise bromide to bromine???
If i can, my plan would be to make a solution of potassium bromide in a flask then add hydrogen peroxide(3%) to oxidise it to bromine then attach one
end of some plastic tubing to the top and atach the other end to another flask. So the bromine will
release its vapours which will go up the tube and condense in the other flask
Would this work???
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violet sin
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try
http://www.sciencemadness.org/talk/viewthread.php?tid=20090
http://www.sciencemadness.org/talk/viewthread.php?tid=16659
and
http://www.sciencemadness.org/talk/viewthread.php?tid=13104
also quick search of youtube. not a great place for great chem, but some users there aren't idiots  https://www.youtube.com/watch?v=6L7hIWZzWE8
[Edited on 11-2-2015 by violet sin]
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Ramium
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Sorry
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Ramium
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Those r all using acid how about with H2O2???
Its still not clear even after reading those threads
[Edited on 11-2-2015 by Ramium]
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violet sin
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is that the only approach you have the supplies for?
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Ramium
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I also have some HCL(33%) if that works
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Ramium
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I just thought that H2O2 would be easyer.
Of course HCL and H2O2 arent my only chemicals i have heaps more
But HCL andH2O2 and KMNO4 r my only oxidisers
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violet sin
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http://www.google.com/patents/US5266295
"The invention relates to the oxidation of bromide ions to bromine using hydrogen peroxide as the essential oxidant in the presence of a strong acid
which is present in an amount to increase the percent conversion of bromide to bromine."
they used high strength acid, and H2O2 in that one. "When present, 95% sulfuric acid, 85% phosphoric acid, or water were also added. Hydrogen
peroxide (30 or 35% w/w)"
but it could be a stepping stone maybe(?) towards a more home oriented version.
-----------
this might be worth reading too
http://pubs.acs.org/doi/abs/10.1021/ja01303a054
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Ramium
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I had a closer look at the second thread in your first post it said that if you get sodium bisulphate and add potassium bromide and potassium
permanganate and add a few drops of water it produces bromine gas. If i did this in a flask with a tube atached to the top and the other end of the
tube to another flask then would it condense in the second flask???
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violet sin
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my guess, you will have compatibility issues with the tubing.
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Ramium
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How do u sugest i condense the bromine ??? (if i need special equipment to condense it Could you tell me the names of the gear and give a link to
somewhere where i can learn how to use the gear. I only have a few beakers, glass stir rods, safety epuipment etc so i dont know how to use any of the
fancy stuff.)
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Mailinmypocket
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Not trying to discourage you but if you don't know what the thing that condenses the bromine is called... (A condenser) Should you be distilling
bromine as a beginner project? It causes severe deep skin burns that heal slowly, the vapors smell very strong and burn lungs and eyes pretty quick...
Nonetheless it's pretty easy to prepare. The distillation idea is here
http://woelen.homescience.net/science/chem/exps/raw_material...
Personally I prefer the KBr/H2SO4/H2O2 route but that's just a preference:
http://www.sciencemadness.org/talk/viewthread.php?tid=13104
Note to self: Tare the damned flask.
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blogfast25
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Quote: Originally posted by Mailinmypocket  | | Should you be distilling bromine as a beginner project? It causes severe deep skin burns that heal slowly, the vapors smell very strong and burn lungs
and eyes pretty quick... Nonetheless it's pretty easy to prepare. |
Indeed.
Be careful, read up thoroughly and have a back up plan if things go wrong.
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gdflp
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I fully agree with the above posts, bromine is not a project for beginners, especially without the right equipment. If you decide to make it though,
you must have a solution of a reducing agent like sodium sulfite, bisulfite, metabisulfite, thiosulfate, etc. on hand to immediately neutralize any
spills whether they are on your skin or on the surface you're working on.
[Edited on 2-11-2015 by gdflp]
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diddi
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with respect Ramium, if you don't understand why your glassware does not fit, I think you need to try some less challenging materials. even for
professional chemists, bromine has earned healthy respect as being difficult to handle and work with, and even more so, difficult to store. the fumes
are choking, it is toxic and corrosive, and it is one of the best chemical houdinis you will encounter.
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Ramium
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I have read up on the hazards i have respiratory gear to deal with the fumes
I will store it in a sealed ampoule i will be wearing gloves and thick cloving
I have done dangeros stuff like this before
[Edited on 12-2-2015 by Ramium]
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Ramium
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I dont plan to do this experiment untill i understand how to use all the special equipment
So if you tell my what equipment i need a can learn how to use it
Then i will understand why my glass wear does not fit diddi
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diddi
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ok, so quickfit glassware has a size usually printed onto the side of the joint eg 24/40
the 24 is the width and the 40 is the length of the joint. so if you seem to have two pieces the same size (diameter) but they don't join, they might
be 24/28 and 24/40, which will have different tapers and not connect properly.
one is .eu standard, other is US
btw when you are assembling your glassware, always grease your GG joints and if there is likely to be pressure it is a good idea to use clips as well
to keep the joints stable. and lastly, don't rely on a joint to support the apparatus, you need stands to hold items in place.
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Ramium
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Thanks!!
I am probably going to plan this experiment for a few mouths before i attempt it
I dont wont to get anything wrong
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Ramium
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| Quote: Originally posted by diddi | ok, so quickfit glassware has a size usually printed onto the side of the joint eg 24/40
the 24 is the width and the 40 is the length of the joint. so if you seem to have two pieces the same size (diameter) but they don't join, they might
be 24/28 and 24/40, which will have different tapers and not connect properly.
one is .eu standard, other is US
btw when you are assembling your glassware, always grease your GG joints and if there is likely to be pressure it is a good idea to use clips as well
to keep the joints stable. and lastly, don't rely on a joint to support the apparatus, you need stands to hold items in place.
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could you tell me the names of the particular pieces of gear i need so i know what to buy ???
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Chemosynthesis
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Lab stands, clamps and keck clips are a good start. Try to get a lab book of some kind if you are not sure of how to set things up, and browse through
pictures on here.
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Ramium
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I mean the gear i need for this particular experiment
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morganbw
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You need to let it go until you do not have to ask these silly questions, Bromine
is not something to consider unless you have very good lab skills.
Even then it can bite you.
I am sorry if this seemed a bit rude, just be careful please.
[Edited on 12-2-2015 by morganbw]
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blogfast25
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Gentlemen.
It does all depend a lot on the kind quantities one wants to produce. I prepared about 0.5 ml of wet bromine when I was about 15. I oxidised KBr and
collected the wet, undistilled Br2 with a small separating funnel. Enough to verify some its properties and to marvel at this dark liquid.
At such low quantities the risk to oneself is very small, especially if you still take the necessary care.
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Ramium
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| Quote: Originally posted by morganbw | You need to let it go until you do not have to ask these silly questions, Bromine
is not something to consider unless you have very good lab skills.
Even then it can bite you.
I am sorry if this seemed a bit rude, just be careful please.
[Edited on 12-2-2015 by morganbw] |
this is something i want to work towards i will only attempt it when i am
more experinced i am just asking what i have to learn to be able to do this
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