Re: Copper and ammonium carbonate

"Erlend Meyer" <"mitt"."navn"@gmail.com

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| I need to produce basic copper carbonate, and from what I can remember this
| could be done by "leaching" it with ammonia and ammonium carbonate and
| precipitate it by boiling the liquor. But i've lost all my notes on the
| reaction and I can't seem to find it on the web. It's just something I
| picked up in Ullmans Dictionary waaay back... Does anybody know how this
| reaction proceeds?
|
| --
| Erlend Meyer




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Well you don't specify which copper carbonate you want, and I don't know what
Ullmans Dictionary is, however, I do have UllmaNN's Encyclopedia, albeit not the
current edition ($ 12 000). Ullmann (among others) sez to buy the obvious water
soluble copper salt (Home Depot, &c.) and add to it the obvious water soluble
carbonate to produce "light" copper carbonate.

NB - The product(s) formed are condition (sol. con./temp) dependent.

Copper in an excess of air disolved in aq. sol. of ammonium carbonate yeilds something blue
perhaps cupric diammino-carbonate (Cu(NH3)2CO3. (Mellor's opus. 3:275)

Cupric oxide in ammonium carbonate yields something blue and green. &c., &c.

Mellor devotes 14 pages to copper carbonate. If he only reported what was know for sure
..... 1/2 a page would have done nicely.




--
donald j haarmann
-----------------------
Science is a collection
of successful recipes.

Paul Valéry
French poet-essayist
(1871-1945)





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