[sdiy] Messy workshop and Into the future (was Old Age and Synth-DIYers)

[René Schmitz]

Ian Fritz wrote:

> I really don't know. Ferric chloride is an acid, so you can neuteralize 
> it with baking soda, as I remember.  Any chemistry geniuses that know 
> this  one?

Its actually a salt, what ever you put in there you will still have the 
iron and copper in there. The best you can hope for is an oxide or 
something that isn't directly water solvable. But still these can react 
with mild acids, like acid rain, and become solvable again.
IMO the stuff still doesn't belong to the landfill but to the toxic 
waste disposal!

Neutralisation here only means that you get a pH of 7, not that the 
solution does not pose a harm. Heavy metall ions are usually toxic.

I know of a reaction that falls out the Copper in Cu2SO4, which is what 
you get from using ammonium or soduim persulfate. You put in NaOH, and 
heat it up. (The NaOH can be from your developer...) The copper does 
fall out as black copper(II)oxide.

Cheers,
  René

-- 
uzs159 at uni-bonn.de
http://www.uni-bonn.de/~uzs159