Siddy - 30-10-2007 at 16:08
Does anyone know a method for producing Silver Nitrite from Silver Nitrate?
AgNO3 > AgNO2?
[Edited on 7-11-2007 by Siddy]
Xenoid - 30-10-2007 at 17:53
".......on heating to 450 oC, silver nitrate decomposes into silver nitrite, AgNO2; and this at higher temperatures is further broken down to metallic
silver and oxides of nitrogen."
Regards, Xenoid
[Edited on 30-10-2007 by Xenoid]
Siddy - 30-10-2007 at 20:16
Thanks very much for the replies.
Chloric1, your right, i should have tried harder. I just bought a nintendo Wii, is it that obvious ive been up all night playing Zelda?
Xenoid, thats interesting. Now to make a 450oC system.
AgBr > AgNO2 with H2SO4 and NaNO2
Siddy - 6-11-2007 at 15:18
I didnt want to start a new thread, so ill add this question.
AgBr to AgNO2
AgBr is insoluble in water, so can i dissovlve AgBr is H2SO4, making HBr and AgSO4 (in solution). Then add NaNO2 to crash out AgNO2.
Might need to extract/boil HBr first?
PHILOU Zrealone - 5-2-2008 at 09:01
The easiest method of all is to make a saturated solution of AgNO3 in demineralised water.
To make a saturated solution of NaNO2 in demineralised water also.
Then to mix the two...following solubilities rules AgNO2 will precipitate as white flakes.
A slight exces of NaNO2 solution is suitable because Ag(+) is the expensive component...and it pushes a bit the precipitation on the correct side.
Filtrate and dry (not in the sun).
AgNO3 is quite photosensitive (solid or in solution!)so do not expose it to strong light especially sunlight.
AgNO2 is also photosensitive (solid or in solution); so does AgBr.
All will darken in sunlight....the black stuff turning your glasware silver mirror is elemental silver...
Wash all your glasware wel several times with demi-water afterwards...
Siddy,
AgBr is unsoluble in water, so does Ag2SO4 ...both being more unsoluble than AgNO2; don't expect NaNO2 to displace Ag from its bromide/sulfate.