CHRIS25
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MgSO4 and CuSO4 best drying agents for FeCl3
Have a 40mL solution of concentrated FeCl3 recently made and in a dessicator bag with CaCl2 and MgSO4 (reduced to anhydrous from epson salt before
using). Other drying agents are according to MERCK not suitable, except the CuSO4. Just looking for confirmation please, trying to acquire only the
hexahydrate.
[Edited on 4-2-2013 by CHRIS25]
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Lambda-Eyde
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You're trying to obtain ferric chloride hexahydrate from a concentrated solution? Just evaporate it with gentle heat.
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Vargouille
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Since you're just making a dessicator bag, the only thing that should matter for what your "dying agent" is is how well it dries, since the only
vapors you'll be giving off are water and (perhaps) HCl. NaOH, CaCl2, MgSO4, etc. should all work fine.
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CHRIS25
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Ah, I was still concerned that even with gentle heating that I could risk hydrolysis of the FeCl3? Hence the slow road method. Thanks Vargouille,
MgSO4 is the most efficient and then CaCl2 but this latter is Very very slow, of all the references that I read they all said that Potassium or Sodium
Hydroxide was not recommended for this particular solution. However I am aware that it is very good for absorbing acid vapours. Used it for Copper
and silver nitrate.
‘Calcination… is such a Separation of Bodies by Fire, as makes ‘em easily reducible into Powder; and for that reason ‘tis call’d by some
Chymical Pulverization.’ (John Friend, Chymical Lectures London, 1712)
Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. (William Penn 1644-1718)
The very nature of Random, Chance development precludes the existence of Order - strange that our organic and inorganic world is so well defined by
precision and law. (me)
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