Chemistry Forums for Students > Undergraduate General Chemistry Forum
Identification of a Copper (II) Compound
Hanzolot:
Hi there!
We were asked to identify an unknown copper (II) compound, using spectophotometry. The information that we have on the compound is:
-It's black
-Metallic lustre
-Smelled somewhat reminiscent of stale urine
-Not too hard (pieces that were clumped together were broken up without too much difficulty)
-A salt or hydride
- Around 23.6% Copper (II)
-Very soluble in water (solution turned a light blue), ammonia (turned a dark blue, not as soluble as the others), and H2SO4 (light blue). Initially, when breaking up, it turned a brownish-green.
-Around 0.28 absorbance at 585 nm.
We've tried Googling every compound we came across, and it's not coming out clear which compound it could be.
If any brilliant chemist on here has an idea of what it is, or where to find out what it is, it'd be much appreciated.
Thanks,
Hans Lafford
Borek:
--- Quote from: Hanzolot on January 10, 2006, 11:53:09 AM ----Around 0.28 absorbance at 585 nm.
--- End quote ---
This information - as given - is completely useless.
Hanzolot:
--- Quote from: Borek on January 10, 2006, 12:30:35 PM ---This information - as given - is completely useless.
--- End quote ---
That's why I included the rest of the information too. ;)
Albert:
--- Quote from: Hanzolot on January 10, 2006, 11:53:09 AM ----It's black
--- End quote ---
The only black copper compound I know it's cupric oxide (CuO), which I think to be also quite soluble in water, but it's certainly soluble in sulfuric acid.
However, every time I saw cupric oxide, it was a black powder.
Borek:
--- Quote from: Albert on January 10, 2006, 04:07:55 PM ---The only black copper compound I know it's cupric oxide (CuO), which I think to be also quite soluble in water, but it's certainly soluble in sulfuric acid.
However, every time I saw cupric oxide, it was a black powder.
--- End quote ---
Wrong smell, way to low molar mass.
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