Protium - 3-1-2005 at 00:54
If one were to add HgCl2 to acetic acid (either glacial or say 50%), would Hg(OAc)2 precipitate?
Could acetic acid be removed under reduced pressure to obtain Hg(OAc)2 ?
runlabrun - 3-1-2005 at 01:53
Could work with glacial...
HgCl2 + 2(CH3COOH) --> Hg(OOCCH3)2 + 2HCl
However i dont know if acetic acid would be able to displace the Cl.... could be...
Could try if that doesnt work HgO instead of HgCl2:
HgCl2 + K2Cr2O7 --> 2KCl + HgO + 2CrO3
is that right????
Re-x HgO from distilled water to decent purity and reflux with glacial acetic acid:
HgO + 2(CH3COOH) --> Hg(OOCCH3)2 + H2O
Strip off excess acetic acid and water under reduced pressure.
-rlr
JohnWW - 3-1-2005 at 02:08
Mercuric acetate is very soluble in water, e.g. 25 parts/100 parts water at 10ºC and 100 parts/100 parts water at 100ºC, so it would certainly not
"precipitate" easily. HgCl2 is somewhat less soluble, ranging from 3.6 to 61.3 parts/100 parts water at 0º and 100ºC respectively, so
fractional crystallization would not work. I doubt if using glacial acetic acid would make any difference.
Esplosivo - 3-1-2005 at 07:57
A simple double displacement reaction will do the trick. Assuming that you have HgCl2, you could react this with lead acetate (the production of which
can be found in the PbO2 thread). PbCl2 would precipitate out. Make sure the mixture is kept cold since the lead (II) chloride tends to dissolve quite
easily when the water is warm. Simple enough. For further purity you could use another acetate which gives a far more insoluble chloride. Hope this
helps.