Blackout
Harmless
Posts: 25
Registered: 26-11-2004
Location: Canada
Member Is Offline
Mood: No Mood
|
|
black Fe2O3?
Unfortunately, I didn't weight the reagents...
To a small glass jar containing Fe2O3 (red-brown), I add 3% H2O2. Evolution of heat and dioxygen was noticed. After about one week keeping the stuff
under water, it turn slowly black. After drying, I test the black powder with a small magnet, the test was positive. I would have believed that it was
Fe3O4 but Fe2O3 is to stable to react with H2O2. What did I made??
\"Si vis pacem, para bellum.\"
\"If you wish for peace, prepare for war.\"
|
|
|
12AX7
Post Harlot
Posts: 4803
Registered: 8-3-2005
Location: oscillating
Member Is Offline
Mood: informative
|
|
Hm, that is rather odd. Fe3O4 (or iron even) would have to be reduction, not something that happens much with H2O2!
Maybe it just corroded it in some way that it's microscopically black, rather than black in color?
Tim
|
|
|
azaleaemerson
Harmless
Posts: 27
Registered: 8-4-2005
Location: AR
Member Is Offline
Mood: No Mood
|
|
Yeah, very tiny particles of rust are black in color. Do a search on magnetic fluids and you'll see some very cool black liquids. They are made
of precipitated rust suspended in oil.
azalea
|
|
|
Jettin4u
Harmless
Posts: 8
Registered: 1-7-2005
Member Is Offline
Mood: No Mood
|
|
You probably turned Fe2O3 into Fe3O4 which is insoluble in water and is black and has a metallic luster with magnetic properties
|
|
|
uber luminal
Hazard to Others
Posts: 124
Registered: 25-8-2004
Member Is Offline
Mood: No Mood
|
|
Fe304 is magnetic and since its black... This should probably answer your question.
The magnetic fluids are made not with rust, but with Fe3O4 or powdered Fe. (FerroFluid)
Fe2O3 can be magnetic if activated or held at a certain temp, but I dont think its magnetic in normal conditions.
|
|
|
Jettin4u
Harmless
Posts: 8
Registered: 1-7-2005
Member Is Offline
Mood: No Mood
|
|
umm, thats what i said 
|
|
|
IrC
International Hazard
Posts: 2710
Registered: 7-3-2005
Location: Eureka
Member Is Offline
Mood: Discovering
|
|
This link has good information on liquid magnets:
http://www.sci-spot.com/Chemistry/liqimag.htm
|
|
|
chloric1
International Hazard
Posts: 1147
Registered: 8-10-2003
Location: GroupVII of the periodic table
Member Is Offline
Mood: Stoichiometrically Balanced
|
|
How cool
Hey all you need is oleic acid from one of those candle/soap making suppliers and some kerosene. You can read more at about.com
Fellow molecular manipulator
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
