reidy2015
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difference between iron 111 chloride and anhydrous iron 111 chloride
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IrC
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I'm no chemist but my guess would be water.
"Science is the belief in the ignorance of the experts" Richard Feynman
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Volanschemia
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Iron(III) Chloride usually exists as the hexahydrate, being Iron(III) Chloride Hexahydrate (FeCl3•6H2O)
Anhydrous means that the molecule does not have any hydration, so anyhrous Iron(III) Chloride has no water integrated into its crystal structure.
"The chemists are a strange class of mortals, impelled by an almost insane impulse to seek their pleasures amid smoke and
vapor, soot and flame, poisons and poverty; yet among all these evils I seem to live so sweetly that may I die if I were to change places with the
Persian king" - Johann Joachim Becher, 1635 to 1682.
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reidy2015
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Thanks 
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aga
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AFAIK Ferric Chloride cannot be brought to an anhydrous state once it has come into contact with water.
It simply will never let go of all the water, so boiling it to dryness doesn't work.
The only way i know to get true Anhydrous FeCl3 is by direct union of the elements (pass chlorine gas over/through iron filings).
The '111' should be written as (III) which shows the oxidation state of the iron in the compound (3 in this case) e.g.
Iron (III) Chloride = FeCl3 = Ferric Chloride, Fe being 3+
Iron(II) Chloride = FeCl2 = Ferrous Chloride, Fe being 2+
[Edited on 15-5-2015 by aga]
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j_sum1
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My experience of FeCl3 is that it is hard to dry. I gave up.
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