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Magpie has died
I also received the message yesterday evening and I really had a difficult time to deal with it. May ...
13-12-2019 at 00:41
by: woelen
Ammonium Chromate [(NH4)2CrO4] PREPARATION
Put some of your dried ammonium chromate in a test tube and heat. If it indeed is ammonium chromate, ...
11-12-2019 at 23:37
by: woelen
Ruthenium too good to be true?
With this seller you can have good look, but you also can have something completely different.

I ...
11-12-2019 at 00:15
by: woelen
Possible easy thionyl chloride synthesis
You want dead?
Phosgene is extremely dangerous. Only a very small amount is needed to screw up your ...
11-12-2019 at 00:03
by: woelen
Ammonium Chromate [(NH4)2CrO4] PREPARATION
If I look at the color of your product, then I indeed think that you precipitated K2Cro4, Na2CrO4 or ...
10-12-2019 at 23:49
by: woelen
Invitation to Participate in a Research Study
[quote]a) run it by woelen or similar;p[/quote]
I am a moderator of this forum, and I have done qui ...
10-12-2019 at 06:14
by: woelen
Copper disposal issues
If the solution is only 200 ppm by weight in copper, then I would simply discard it and flush it dow ...
10-12-2019 at 05:53
by: woelen
H2SO4 on an extreme budget?
NaOCl added to bleach indeed works quite well. Gives gaseous Cl2 and Na2SO4, which will separate in ...
10-12-2019 at 05:47
by: woelen
Any method to convert potassium dichromate to ammonium dichromate?
One way to make ammonium dichromate is adding a solution of ammonium perchlorate. KClO4 then precipi ...
7-12-2019 at 07:21
by: woelen
What's the minimum concentration for h2so4 to be oxidising?
Indeed, H2SO4 is oxidizing, HSO4(-) is much less so and SO4(2-) is not. You need concentrations of 8 ...
5-12-2019 at 23:59
by: woelen
Why can't I find amorphous P on ebay?
I have good experience with that seller S3. I purchased red P, HBr (48%), and CH3NH2.HCl from them. ...
5-12-2019 at 03:55
by: woelen
Got some rare stuff. Arsenic trioxide
[rquote=627461&tid=154531&author=Ubya]you are welcome.

i might be interested in buying so ...
4-12-2019 at 12:02
by: woelen
Report on making Tin Iodide and Antimony Iodide
Very nice synthesis of SbI3 and SnI4. I made SnI4 a few years ago:

https://woelen.homescience.net ...
3-12-2019 at 11:24
by: woelen
Is it good to hoard chemicals?
Many many chemicals have unlimited shelf life, provided they are stored in perfectly sealed containe ...
29-11-2019 at 11:50
by: woelen
Report on making Manganese Iodide MnI2
@Bezaleel: The bis(ethylenediamine) nickel(II) complex is dark blue, not pink. I never succeeded in ...
28-11-2019 at 23:47
by: woelen
Report on making Manganese Iodide MnI2
If you want a really beautiful iodide, try HgI2. This is the most brilliant, deeply saturated orange ...
26-11-2019 at 04:00
by: woelen
Report on making Manganese Iodide MnI2
Nice synthesis. Given the pink color of your product, you also succeeded in getting a product of dec ...
25-11-2019 at 23:33
by: woelen
Lab reagent challenge
What practically can be done at reasonable cost from OTC chemicals (NaCl and KCl) is making NaClO3 a ...
24-11-2019 at 23:48
by: woelen
handeling hydrazine
[rquote=626542&tid=154457&author=chemist1243]
thats why im asking you....for help. plus, ju ...
22-11-2019 at 07:34
by: woelen
What's the minimum concentration for h2so4 to be oxidising?
For oxidation of copper metal you need highly concentrated acid (90+%) and even then, some gentle he ...
22-11-2019 at 07:26
by: woelen
sulfur monochloride
But now you are adding additional reagents. In your previous post you wrote that simply adding Seo2 ...
22-11-2019 at 00:41
by: woelen
sulfur monochloride
Are you sure about that? I have tried this reaction a few times, and I get a yellow solution, contai ...
21-11-2019 at 11:12
by: woelen
handeling hydrazine
Pure hydrazine is very dangerous stuff and is unstable. It easily decomposes and forms gaseous produ ...
20-11-2019 at 23:52
by: woelen
Why can't I dissolve my CuI in acetonitrile?
Exactly, and that also is the reason why I added some acid, because Na2SO3 is somewhat alkaline and ...
20-11-2019 at 23:40
by: woelen
Why can't I dissolve my CuI in acetonitrile?
[rquote=626468&tid=154451&author=rockyit98][...]dude! watch your chemistry.the ratio is 2:1 ...
20-11-2019 at 08:06
by: woelen
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