Re: Mixing ferric oxalate

[Clay <wcharmon@wt.net>]

The last batch I mixed up took one and a half days to completely go  
in to solution. I would periodically reheat to about 120 degrees and  
use my electric stirrer for half an hour and then let it sit for a  
few hours.  It can just take a lot of time on occasion. BTW, I think  
your proportions are off. I use that amount of ferric to make up  
100ml of solution, not 50ml. That would explain a lot of it.

Clay

On Sep 9, 2006, at 2:06 PM, John Brewer wrote:

> Dear list
>
> I'm mixing ferric oxalate solution from powder and it just isn't  
> going into solution. I used 27g ferric oxalate with 4.8g oxalic  
> acid and 2g EDTA (Na4). I used hot distilled water to 50ml. I've  
> been stirring for 3/4 hour and I still have a yellow green opaque  
> liquid and my hand is about to fall off. Is it normal to take so  
> long? Can I reheat a little? Any tips/ideas?
>
> Thanks
>
> John.
>
> www.johnbrewerphotography.com
>
> Life shrinks or expands in proportion to one's courage. Anaïs Nin.