phototropism
Harmless
Posts: 3
Registered: 14-3-2014
Location: Malaysia
Member Is Offline
Mood: No Mood
|
|
Preparation of Hg(NO3)2 and Pb(NO3)2
Anybody know how to prepare mercury II nitrate and Lead II nitrate solution from solid mercury II chloride and Lead II Chloride?
|
|
|
thesmug
Hazard to Others
Posts: 370
Registered: 17-1-2014
Location: Chicago, Il (USA)
Member Is Offline
Mood: No Mood
|
|
I believe that nitric acid treatment would work.
[EDIT] I'm also wondering, where would one get mercury and lead chlorides? Did you make them yourself? I've heard they can be useful for some
reactions.
[EDIT] Oh, probably for oxidizer use. Nevermind!
[Edited on 3/15/14 by thesmug]
[Edited on 3/15/14 by thesmug]
|
|
|
HgDinis25
Hazard to Others
Posts: 439
Registered: 14-3-2014
Location: Portugal
Member Is Offline
Mood: Who drank my mercury?
|
|
Mercury (II) Chloride has a solubility of 48 g/100 mL in water, at 100 ºC (http://en.wikipedia.org/wiki/Mercury%28II%29_chloride). If you make a solution of it and add a source of OH ions, like sodium hydroxide, you would
get a precipitate of yellow Mercury (II) oxide (theorethical you would get the hydroxide but it decomposes too rapidly into the oxide).
You could then treat it with nitric acid to yeald mercury (II) nitrate.
|
|
|
phototropism
Harmless
Posts: 3
Registered: 14-3-2014
Location: Malaysia
Member Is Offline
Mood: No Mood
|
|
Okay, thanks a lot, so nitric acid will do the job. The preparation is the same as making insoluble metal salt solution: dissolve lead II chloride in
acid with mild heat then filter it...right?
If I want the end concentration of salt solution to be 1g/L of lead II nitrate, then I should dissolve 1g of lead II chloride in 1L of nitric acid?
[or...should I first crystallize the filtered salt solution, then weight 1g of it and dissolved in 1L of ddH2O?]
p/s: this will be my first making my own metal salt [we used to buy it form supplier which took times to order and arrive...well this time, need to
use the chem a.s.a.p]... ><'
Btw, I got those chemicals [ Pb and Hg chloride from my university lab.
|
|
|
BromicAcid
International Hazard
Posts: 3231
Registered: 13-7-2003
Location: Wisconsin
Member Is Offline
Mood: Rock n' Roll
|
|
You might need to carry out the conversion thusly:
Add the salt to the nitric acid, heat to dissolve, begin to boil the acid, boil down till crystals appear, add more nitric acid, heat to dissolve,
repeat a few times. Every time you do this you are removing chloride (as hydrogen chloride) and leaving behind nitrate until you completely replace
your anion. Do a silver nitrate test to confirm replacement. You will need to dillute a small sample of the mixture to get a good silver nitrate
test since it does not do well in concentrated nitric.
Note however, very important, this will send out a mico-fine spray of solution over everything you work with. You likely will not see it, not even
know it is there. But with lead and mercury, beware.
|
|
|
phototropism
Harmless
Posts: 3
Registered: 14-3-2014
Location: Malaysia
Member Is Offline
Mood: No Mood
|
|
Thanks for the method. I just wondering, will fume hood chamber enough to reduce the risk dealing with those heavy metal salt? feels like better wait
for prepared chem by the pro chemist from the market.
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
