chief
National Hazard
Posts: 630
Registered: 19-7-2007
Member Is Offline
Mood: No Mood
|
|
mixing HMnO4 and HClO3 ??
I asked this in the short-question-thread, but maybe noone reads it there:
What cen be expected when mixing HMnO4 and HClO3 ? Do these 2 acids coexist, or gives it danger, or does one or the other decompose ??
The plan would be: React Ba(MnO4)2 + Ba(ClO3)2 + H2SO4 (dilute);
some chloride-impurity would also lead to some HCl ...
|
|
|
Jor
National Hazard
Posts: 950
Registered: 21-11-2007
Member Is Offline
Mood: No Mood
|
|
Bariumpermanganate might be a bit hard to prepare, or am I wrong?
If you have CCl4, Pure HMnO4-solution is easy.
Add conc. H2SO4 to KMnO4, extract the Mn2O7 with CCl4, and add water, to react the Mn2O7 to HMnO4, wich dissolves in the water. Voila, pure HMnO4
solution. Preparing metal permanganates is best done with the Mn2O7-solution in CCl4, a metal oxide, hydroxide or carbonate and a catalytic amount of
water.
But if you want to know if they mixture of HClO3 and HMnO4 can exist in aqeous solution, simply add KMnO4 and sodium chlorate to dilute sulfuric acid.
The sodium, potassium and sulfate-ions won't influence the results. However if you're talking about the anhydrous acids, it's another story. But
chloric acid is very dangerous and unstable (explodes with no reason), so having it anhydrous is suicide.
[Edited on 12-10-2008 by Jor]
|
|
|
chief
National Hazard
Posts: 630
Registered: 19-7-2007
Member Is Offline
Mood: No Mood
|
|
About Ba(MnO4)2 see my latest postings in the permanganates-thread [page 12]:
https://sciencemadness.org/talk/viewthread.php?tid=8480&...
[Edited on 12-10-2008 by chief]
|
|
|
woelen
Super Administrator
Posts: 7977
Registered: 20-8-2005
Location: Netherlands
Member Is Offline
Mood: interested
|
|
Chloric acid anhydrous does not exist. It can be concentrated up to appr. 50%, above that, it decomposes, giving mainly HClO4, ClO2, and H2O, but
there certainly also will be some Cl2 and O2 in its decomposition products.
|
|
|
vulture
Forum Gatekeeper
Posts: 3330
Registered: 25-5-2002
Location: France
Member Is Offline
Mood: No Mood
|
|
Don't do it. HClO3 is only stable in absence of metal impurities, and with your HMnO4 your introducing manganese. In other words, recipe for disaster.
Jor, where did you get that procedure involving Mn2O7 and did you try it? Sounds rather dangerous.
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
