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Unidentified copper salts
The dark crystals spots in the green material is copper(II) acetate. I have made copper(II) acetate ... |
16-2-2022 at 00:13
by: woelen |
Is there an interest of rare metals?
The trouble with osmium, rhenium, ruthenium and other exotic metals is that selling them may be hard ... |
15-2-2022 at 00:44
by: woelen |
Help me choose a barium salt
It depends on the source of the material. I would go for the BaCO3. This dissolves easily in all kin ... |
15-2-2022 at 00:14
by: woelen |
Generating gases from OTC materials
Al-foil with solution of NaCl gives no reaction. If you add a little CuSO4 or CuCl2 to the NaCl, the ... |
11-2-2022 at 03:29
by: woelen |
Is there an interest of rare metals?
Pricewise, only for gold and silver (and to a lesser extent platinum and palladium) there are standa ... |
10-2-2022 at 02:34
by: woelen |
Is there an interest of rare metals?
If you want to keep your money valuable (protect it against inflation), then I only see gold as a vi ... |
9-2-2022 at 02:24
by: woelen |
separation of gold from dental crowns
Thanks for the info. I have a lot of sulfamic acid, so that can be put to good use.
One thing, whi ... |
7-2-2022 at 06:03
by: woelen |
Weird vapour forming above [pretty pure] white phosphorus sample in water
Most likely it is smoke from oxidation of the white phosphorus. I also noticed this with my sample. ... |
4-2-2022 at 05:07
by: woelen |
separation of gold from dental crowns
I had two dental crowns, total weight appr. 5 grams. So, I expect to get around 3 grams of gold. I w ... |
31-1-2022 at 06:17
by: woelen |
separation of gold from dental crowns
I had two dental crowns, and I added the metal from these to aqua regia (made by mixing 4 parts of c ... |
31-1-2022 at 05:01
by: woelen |
Dilute Hydrofluoric Acid Safety
I have experience with 48% HF, and acid at that concentration can be used fairly safely outside a fu ... |
29-1-2022 at 03:11
by: woelen |
Separation of copper nitrate from mixture
You cannot make it anhydrous, not even in vacuum, at least not with decomposition and formation of b ... |
25-1-2022 at 13:45
by: woelen |
free Software for private chemists
I also strongly recommend using one of the current languages, and Delphi certainly is not among them ... |
25-1-2022 at 04:44
by: woelen |
Fake molybdenum 99.999% on Ebay - Warning!
Did you report this at eBay as being fake?
https://ocswf.ebay.com/rti/compose?items=303692834180& ... |
25-1-2022 at 01:38
by: woelen |
free Software for private chemists
Maybe you can develop code for multiple platforms with a single source code. You could e.g. write Ja ... |
21-1-2022 at 04:46
by: woelen |
Cerium dioxide from ceric ammonium nitrate
I tried boiling HCl (30%), boiling H2SO4 (40% or so).
I did not try the really hot things like ne ... |
21-1-2022 at 01:16
by: woelen |
Cerium dioxide from ceric ammonium nitrate
How reactive is this CeO2? Can it be dissolved in acids? I have some CeO2, and that material is extr ... |
19-1-2022 at 10:57
by: woelen |
Small amount of cyanide in Europe?
Interesting, so nowadays, they oxidize sulfide. Apparently the thiosulfate nowadays is separated fro ... |
18-1-2022 at 12:04
by: woelen |
Small amount of cyanide in Europe?
[rquote=670038&tid=158274&author=teodor]That means that the man who asks for 1kg+ has no dep ... |
18-1-2022 at 00:06
by: woelen |
Small amount of cyanide in Europe?
A 100 grams of cyanide is a huge amount for one application, while being only a little amount for an ... |
14-1-2022 at 00:06
by: woelen |
Dimethylamine identification help
I think, I prefer the basic route. The material does have a smell for me, but I do not perceive it a ... |
12-1-2022 at 05:04
by: woelen |
Some experiments with cyanate ion
I did the following experiment:
- Dissolve approximately 150 mg of NaOCN in 4 ml of distilled water ... |
11-1-2022 at 01:45
by: woelen |
Dimethylamine identification help
I have dimethylformamide. I read about synthesis of dimethylamine with that, using HCl and heating f ... |
10-1-2022 at 03:57
by: woelen |
Some experiments with cyanate ion
I'll try and see what pH the cyanate solution has. I can also add a solution of some MnSO4 to it. I' ... |
9-1-2022 at 23:57
by: woelen |
Burning GOLD to oxid
Heating the gold will not work. You may get it so hot, that it melts, but certainly if you have a bu ... |
4-1-2022 at 00:45
by: woelen |
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