Megamarko94 - 3-7-2011 at 07:14
I have some cadmium nitrate which is slightly contaminated with nickle nitrate what would be the easiest way to seperate those two.
i want better purity of cadmium nitrate...
Magpie - 3-7-2011 at 07:43
According to my qualitative analysis scheme Cd++ will be taken down (precipitated) by bubbling in H2S in 0.3M HCl. The ppt will be CdS. Ni++ will
not come down.
Separate the washed CdS and dissolve it in 6M HNO3. This should release the sulfide as H2S leaving you with very pure Cd(NO3)2.
CAUTION: This must all be done outside or in a good fume hood to avoid being fatally poisoned by H2S fumes.
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Also see: http://www.sciencemadness.org/talk/viewthread.php?tid=4676#p...
[Edited on 3-7-2011 by Magpie]