Chemgineer - 4-8-2024 at 11:01
I;ve been experimenting with some vanadium metal foil this weekend.
So far discovered:
hcl has basically no effect on it.
cold sulfuric has no effect.
hot sulfuric has a small impact producing some light green colour.
50% nitric acid has a severe reaction producing a dark blue solution with dark insoluble precipitates.
I'm now trying to react it with nitric acid slowly with an excess of distilled water to see if I can keep everything in solution.
Ok so it seems to react very much like copper nitrate, if you allow it to dehydrate it (boil dry) it decomposes into a dark brown (oxide?)
[Edited on 4-8-2024 by Chemgineer]
Chemgineer - 4-8-2024 at 14:35
So i took my failed brown oxide that boiled dry and added 80$ sulfuric acid to it, after some time and gentle heating this is now a nice light green
solution.
I then put this solution on a hotplate outside and turned it up hot, eventually after a white cloud of sulfuric acid had cleared I am left with a nice
orange compound in my beaker.
[Edited on 4-8-2024 by Chemgineer]
Chemgineer - 5-8-2024 at 04:26
When heating the vanadium sulfate to dryness it becomes a bright orange oily substance but on cooling it eventually goes green again as it absorbs
water from the air.
Chemgineer - 5-8-2024 at 12:56
Also can confirm azeotropic (48%) hydrobromic acid has no effect on vanadium at room temperature.