contrived - 12-3-2007 at 22:21
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.)
Pyridinium - 18-3-2007 at 05:30
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?