ssdd
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Registered: 13-4-2007
Location: Central Canada
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KMnO4 + HCl --> Metallic precipite?!
So recently in lab I had to add a small amount of KMnO4 to a test tube of 6M HCl. The solution turned dark brown with bubbling and some heat. But when
I turned the tube on it's side I was suprised to find a small amount of metallic like substance stuck to the side of the tube. I attempted to isolate
it and could not. The reaction does not call for this, but I was thinking perhaps some Mn metal? I am baffled so if anyone has any ideas that would be
great.
**The tube was new so impurities are limited.
-ssdd
All that glitters may not be gold, but at least it contains free electrons.
-- John Desmond Baernal
http://deepnorth.info/ |
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12AX7
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KMnO4 + 8HCl = KCl + MnCl2 + 2.5 Cl2 + 4H2O
You might've been seeing a higher, possibly mixed oxidation state of Mn (in the above reaction, exchange some MnCl2 + Cl2 for "MnCl3" or "MnCl4"),
complexed with Cl, as a metallic glint.
Kind of like your sig.
There's certainly nothing metallic going on here, as Mn metal reacts vigorously with HCl.
Tim
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ssdd
Hazard to Others
Posts: 211
Registered: 13-4-2007
Location: Central Canada
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Mood: Hypergolic
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Thanks that helps, these unexplained things bug the crap out of me so I ask.
Thanks again,
-ssdd
All that glitters may not be gold, but at least it contains free electrons.
-- John Desmond Baernal
http://deepnorth.info/ |
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