Megamarko94
Hazard to Self
Posts: 68
Registered: 31-12-2010
Member Is Offline
Mood: No Mood
|
|
Cadmium nitrate purification...
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
lab constructor
Posts: 5939
Registered: 1-11-2003
Location: USA
Member Is Offline
Mood: Chemistry: the subtle science.
|
|
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.
---------------
Also see: http://www.sciencemadness.org/talk/viewthread.php?tid=4676#p...
[Edited on 3-7-2011 by Magpie]
The single most important condition for a successful synthesis is good mixing - Nicodem
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
