ostaur - 2-2-2006 at 05:18
hello,
i need to know dehydratation steps of iron chloride FeCl3*6H2O
does anybody have any information about thermical decomposition of this compound
sparkgap - 2-2-2006 at 05:23
Try here.
Jeez! 
sparky (>_<
[Edited on 2-2-2006 by sparkgap]
ostaur - 2-2-2006 at 06:01
thank you for your reply and suggestion but i have almost seen the information on google site
there is no article or scientific information on what im looking for
all you find is about material safety data sheet.......
woelen - 2-2-2006 at 10:26
Indeed, sometimes google is not really your friend. I also have a lot of questions, which really cannot be answered by searching on Google.
But ostaur, if you ask a question, make clear that you have put effort in searching, then people certainly are more inclined to help you.
If you heat FeCl3.6H2O, then the compound partially hydrolyses. It gives off H2O, but also HCl. What remains behind is some basic ferric
chloride/oxide/hydroxide stuff. The precise composition of the compound, which remains behind is not easy to determine, it most likely is a
non-stoiciometric compound of the form FeClxOy(OH)z, with x+y/2+z = 3. The solid remains are insoluble in water. I have tried that. It dissolves
(slowly) in dilute acid. The stronger the heating, the more difficultly the residue dissolves in acid.
ostaur - 3-2-2006 at 00:19
i have also tried to heat FeCl3*6H2O at 200°C and it gives
according the color characteristics (brown-black) the iron chloride anhydre, but i am not sure what happens under this temperature it keeps how many
molecules of water...
for this reason i needed to know deshydration steps...
to be noted that iron chloride is very sensible to humidity et maybe in contact with air it becomes more hydrated.....
thanks a lot for your reply and i'd appreciate any other suggestion 
12AX7 - 3-2-2006 at 07:29
As I recall it has to be dried in a stream of HCl (obviously anhydrous itself).
Else it could be prepared from the elements by passing (dry) chlorine over steel turnings until FeCl2 then FeCl3 is formed. It can probably be
refined through sublimation, although I forget if it tends to decompose to FeCl2 + Cl.
Tim
ostaur - 10-2-2006 at 07:11