CHRIS25 - 4-2-2013 at 01:40
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]
Lambda-Eyde - 4-2-2013 at 01:47
You're trying to obtain ferric chloride hexahydrate from a concentrated solution? Just evaporate it with gentle heat.
Vargouille - 4-2-2013 at 01:58
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.
CHRIS25 - 4-2-2013 at 06:07
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.