Ferric Oxalate..

Adam Kimball (afk@uclink2.berkeley.edu)
Sat, 7 Jan 1995 12:00:01 -0800

I just bought some Ferric Oxalate from a major chemical house. The problem
is that I can't get it to dissolve (a 24% solution). Half of it has dissolved
into the familiar green solution and half is just a lump of yellow semi-solid!
I've been working at it with mild-heat and a magnetic stirring device, but
very little of it is dissolving. I've added around .7g of Oxalic Acid
and nothing else. Since I don't have a hot-plate and the stirrer isn't working
I began wondering if this Ferric Oxalate (I believe its a tetra-hydrate) may
just be more difficult to dissolve. Are different types of Ferric Oxalate
(in regard to the amount of water in the solid) more difficult to dissolve
than others? I read in the Bostic&Sullivan catalog that the addition of some
EDTA can often help it dissolve- how much should I add for a 100ml?

Any help would be appreciated,
Adam