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Fantasma4500
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red soluble metal chloride??
ok, before you all think back on metal x....
i just want to hear if any of you knows something about a metal that gives off red chlorides
the source i have is some magnets i found inside a LCD tv screen, behind these square pieces there was some really nice spoons of dense copper wire
i put a few pieces in 30% HCl
and now i got a really nice dark brown/reddish/orange solution
i can see theres iron in it aswell.. i have tried searching up all kinds of rare metal chlorides but no luck..
doesnt look like a boring metal chloride
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simba
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Palladium chloride is red and soluble in lots of different solvents.
[Edited on 19-4-2013 by simba]
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Lambda-Eyde
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Cobalt(II) can be red.
This just in: 95,5 % of the world population lives outside the USA
Please drop by our IRC channel: #sciencemadness @ irc.efnet.org
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12AX7
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I'm thinking strontium or barium ferrite, in which case the color is iron(III).
It would be wonderful if they made magnets with palladium, as it would be very easy to salvage and recover 
Tim
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Finnnicus
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Yeah, cobalt. Probably this http://en.m.wikipedia.org/wiki/Cobalt(II)_chloride from samarium colbalt magnets, samarium(III) chloride solutions are
clearish.
[Edited on 20-4-2013 by Finnnicus]
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Fantasma4500
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palladium chloride, thats very expensive...
well .. by any means i have some interesting metal in these magnets.. i think i have +200g of them, its like, theyre not really magnetic, they loose
magnetic power over time..
think ill take a picture of it.. very clear and nearly flouroscent colour
cobalt could be possible, i have checked up on samarium chloride, IIRC the solution doesnt have any colour as its a white salt
judging by this picture it could potentially be iron-cobalt-samarium magnets i have!
http://www.rareearth-permanent-magnet.com/china-strong_sinte...
ill take some pictures of it..
edit: link to pictures
http://imgur.com/a/qFs8X
[Edited on 20-4-2013 by Antiswat]
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Fantasma4500
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i found the density to be 4.4-4.7
both by measuring a piece then weigting
another one by measuring how many mL its volume is in a 100 mL measuring cylinder and then weighting it
its a hotpressed metal powder after all, which might explain that it doesnt come near the density of cobolt, samarium, iron or copper which is what
its apparently composed of..
i can seperate the iron by boiling it down and decomposing the FeCl3 into Fe2O3 and Cl2 removing with NH4OH (fantastic stuff)
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blogfast25
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Quote: Originally posted by Antiswat  | | i can seperate the iron by boiling it down and decomposing the FeCl3 into Fe2O3 and Cl2 removing with NH4OH (fantastic stuff) |
Careful with notation: FeCl3 with ammonia solution yields Fe(OH)3.nH2O and NH4Cl (not Cl2).
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Fantasma4500
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oh.. no no not that way.. i will put a beaker nearby to react the Cl2 that has gotten out of solution with the ammonia
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blogfast25
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| Quote: Originally posted by Antiswat |
oh.. no no not that way.. i will put a beaker nearby to react the Cl2 that has gotten out of solution with the ammonia |
Cl2 that has gotten out of what solution? How actually?
[Edited on 20-4-2013 by blogfast25]
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Vargouille
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Do you mean HCl? Heating FeCl3 will not give you Cl2 and Fe2O3, but rather Fe2O3 and HCl. In one case, a redox reaction occurs, while in the other a
simple acid-base reaction occurs.
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Fantasma4500
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| Quote: Originally posted by Vargouille | | Do you mean HCl? Heating FeCl3 will not give you Cl2 and Fe2O3, but rather Fe2O3 and HCl. In one case, a redox reaction occurs, while in the other a
simple acid-base reaction occurs. |
are you sure?
i smelt it as Cl2 when i did this last
and the gas was in the glass thing i was heating it in, it didnt escape..
i also saw that it was well atleast a heavy gas by opening a bottle of ammonia, squeezing it and then blowing in the direction of the glass container
just above the bottle, directing ammonia fumes into the (chlorine?) gas.
I dont understand where the hydrogen could come from when decomposing FeCl3..
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chemcam
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FeCl3 reacts with moist air to give the HCl. IIRC FeCl3 is deliquescent.
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blogfast25
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| Quote: Originally posted by Antiswat | are you sure?
i smelt it as Cl2 when i did this last
and the gas was in the glass thing i was heating it in, it didnt escape..
i also saw that it was well atleast a heavy gas by opening a bottle of ammonia, squeezing it and then blowing in the direction of the glass container
just above the bottle, directing ammonia fumes into the (chlorine?) gas.
I dont understand where the hydrogen could come from when decomposing FeCl3.. |
Ermm... YES! The smell of Cl2 and HCl can be mistaken for each other because they're both quite pungent, if it's smell you're going by.
It is HCl vapour (or gas) that reacts with airborne ammonia to give fumes of NH4Cl.
The 'hydrogen' comes from the hydrolysis of the FeCl3
FeCl3 + 3 H2O === > Fe(OH)3 + 3 HCl (oversimplified).
FeCl3 would only decompose to Cl2 at very high temperature and NEVER from FeCl3 solutions.
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Fantasma4500
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hm.. well the rust still gave off some gas that reacted with ammonia, and at that point it was totally dry, guess it couldnt react with all the water
in the air
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12AX7
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SmCo alloys have density 8.2-8.4, so it is unmistakably not SmCo. It would also give off a lot of hydrogen, or require a lot of oxidizer: cobalt
isn't an especially reactive metal, and may require some effort to dissolve (I don't know if this is the case; it is with nickel, but isn't with
iron). It would not simply dissolve in acid.
A density of around 4 is much more suggestive of a ferrite (density 4.8-5.0).
You can determine if it's strontium or barium ferrite by adding a weak solution of a sulfate (sulfuric acid, potassium or ammonium sulfate, etc.) to
the magnet solution. Wash and filter the precipitate (wash with mild acid until it's white and clean), then perform a flame test. Strontium will
glow red, barium green; a mixture will look yellow, but don't mistake this color for the pervasive color of sodium's yellow-orange color (don't use
sodium sulfate, if you can avoid it, because that would be a source of contamination).
Tim
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12AX7
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Also, FeCl3 does give off a small amount of chlorine. The redox potential of the pure stuff is actually quite powerful, such that starting with a
pure compound of Fe(III) (such as the ferrite in question) can cause the solution to bubble a small amount of Cl2, leaving an equilibrium of Fe(II)
and Fe(III).
Tim
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Fantasma4500
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my mistake, i meant when i evaporated all the water and then started to decompose the solid (:
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Fantasma4500
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| Quote: Originally posted by 12AX7 | SmCo alloys have density 8.2-8.4, so it is unmistakably not SmCo. It would also give off a lot of hydrogen, or require a lot of oxidizer: cobalt
isn't an especially reactive metal, and may require some effort to dissolve (I don't know if this is the case; it is with nickel, but isn't with
iron). It would not simply dissolve in acid.
A density of around 4 is much more suggestive of a ferrite (density 4.8-5.0).
You can determine if it's strontium or barium ferrite by adding a weak solution of a sulfate (sulfuric acid, potassium or ammonium sulfate, etc.) to
the magnet solution. Wash and filter the precipitate (wash with mild acid until it's white and clean), then perform a flame test. Strontium will
glow red, barium green; a mixture will look yellow, but don't mistake this color for the pervasive color of sodium's yellow-orange color (don't use
sodium sulfate, if you can avoid it, because that would be a source of contamination).
Tim |
strontium or barium??? this is getting interesting...
it doesnt really dissolve, its more like... its just laying in solution and then very slowly the solution turns more and more red until all HCl is
used up
but i have H2SO4 so that should be interesting
i guess also i could detect that it has actually reacted by putting ammonia gas over the solution while its boiling to see if theres HCl formed tho it
wont give me any clue on what metal ions theres in there..
interesting..
i think before i move on to making the sulfates ill scale it up abit so i can get massive precipitate, perhaps electrolysis of HCl with the pieces..
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blogfast25
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Just to be clear (it really helps in science to be concise!), when you evaporated the water, hydrogen chloride started to come of the solution, NOT
Cl2. To get Cl2 you'd have to thermally decompose anhydrous FeCl3.
[Edited on 21-4-2013 by blogfast25]
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Fantasma4500
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| Quote: Originally posted by blogfast25 | when you evaporated the water, hydrogen chloride started to come of the solution, NOT Cl2. To get Cl2 you'd have to thermally decompose anhydrous
FeCl3.
[Edited on 21-4-2013 by blogfast25] |
actually i didnt think about it that way.. i do have some FeCl3, a few grammes.. i dried this slowly evaporating it.. i will try to heat this stuff up
to be very very sure.. smell should determine if Cl2 or HCl forms (dont worry.. very carefully smelling, not snorting liquid chlorine..)
edit: update on FeCl3 decomp.
im unsure if i produced anhydrous HCl, it was heated in a candle bottom of aluminium, which it went through (??) not sure if this had something to do
with the FeCl3 whatsoever
later heated on knifeblade i smelled the gasses, one time it went straight to my brain, very sharp smell..
it didnt smell like chlorine, so i guess it makes anhydrous HCl somehow, the crystals are all dry incase you were wondering about that..
also back when i got the HCl from heating it, it was all dry, and i was decomposing it into Fe2O3, i didnt know about Fe3O4 > Fe2O3 back then.. (:
[Edited on 22-4-2013 by Antiswat]
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blogfast25
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| Quote: Originally posted by Antiswat | [edit: update on FeCl3 decomp.
im unsure if i produced anhydrous HCl, it was heated in a candle bottom of aluminium, which it went through (??) not sure if this had something to do
with the FeCl3 whatsoever
later heated on knifeblade i smelled the gasses, one time it went straight to my brain, very sharp smell..
it didnt smell like chlorine, so i guess it makes anhydrous HCl somehow, the crystals are all dry incase you were wondering about that..
[Edited on 22-4-2013 by Antiswat] |
The FeCl3 you're talking about is in fact FeCl3.6H2O, ferric chloride hexahydrate (the stuff they use to etch copper with). On heating that further
hydrolyses. Very simply put:
FeCl3.6H2O === > Fe(OH)3 + 3 HCl + 3 H2O
On further heating the hydroxide then dehydrates to Fe2O3:
2 Fe(OH)3 === > Fe2O3 + 3 H2O
Anhydrous ferric chloride (FeCl3) is made by reacting dry iron powder or filings with dry Cl2, while heating. This product would decompose to
iron and chlorine (Cl2) but only on very strong heating (forget a candle!)
This is all very similar for AlCl3 and its hydrates.
Aluminium reacts with ferric chloride hydrate by redox displacement: Fe3+ + Al === > Fe + Al3+. This probably explains why
your 'crucible' got eaten up. Aluminium also has a low MP: about 660 C, so even a candle isn't really safe to use with it! At a minimum use steel soup
cans, or invest in cheap ceramic crucibles.
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Fantasma4500
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hm.. well i used a propane blowtorch on low gas output, weak flame, no platinum in it just airintake through the sides of it..
but yes this might explain why it just went broke nearly instantly.. very interesting (:
could be used for ripping over my aluminium tubes in the future..
but i didnt actually know iron chloride was bound to water atoms..? makes perfect sense now why it forms HCl, very very concentrated HCl..
abit offtopic and yet not..
HCl.. it can be bought seldomly as 37%.. what is the maximum concentration you can acquire from say 98% H2SO4 + NaCl?
it seemed as being very very strong concentration when coming from decomposition of FeCl3..
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MrHomeScientist
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You could do the gas tests for HCl and Cl2 to put an end to the speculation.
Put an open bottle of ammonia next to your setup when you generate the gas - a white mist of NH4Cl will form if it is HCl.
Chlorine is (supposedly) the only gas with a bleaching effect, so hang a colored piece of paper or flower petal in the gas and see what happens. HCl
might bleach a bit too, so the first test would be more conclusive.
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blogfast25
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| Quote: Originally posted by Antiswat | HCl.. it can be bought seldomly as 37%.. what is the maximum concentration you can acquire from say 98% H2SO4 + NaCl?
it seemed as being very very strong concentration when coming from decomposition of FeCl3.. |
What comes off FeCl3 is NOTHING like what you get from NaCl + H2SO4. With the latter, assuming your H2SO4 is 95 % or better you basically get pure HCl
and if you lead it through water and get your numbers right, you can make 37 w% HCl.
Hint: without heating the reaction goes to:
H2SO4(l) + NaCl(s) === > HCl(g) + NaHSO4(s)
There are plenty of posts on H2SO4/NaCl-based HCl gas generators on this forum, so UTSF.
[Edited on 23-4-2013 by blogfast25]
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