contrived
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Posts: 56
Registered: 9-3-2007
Location: Washington State
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Mood: skeptical
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what is this Cr/acid mix
I added the wrong acid to my Cr2O7 solution. Instead of con H2SO4 I added H2PO4. It looks like I have some CrIII in with the Cr VI. Is there some
sort of P-Cr complexing going on?
(I'm not usually this dangerous. I got really tired and we have a ventilation problem we're working on.)
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Pyridinium
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Posts: 258
Registered: 18-5-2005
Location: USA
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Mood: cupric
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I believe you can get a Cr(III) phosphate / aquo complex if you do it just right, though if I understand correctly there would normally be a
precipitate. Maybe the extremely low pH is keeping it in solution. I think normally you get CrPO4.6H2O.
What color is the solution? Can you get absorbance maxima on it?
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