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Bromate, Iodates (sans the chlorates)
I once read the following:

Playing with chlorates in pyrotechnics is like playing with a poisonou ...
11-7-2019 at 10:44
by: woelen
Preparation of Mn3+ and Co3+
Another easier method of having less water would be to use H2SO4 and B2O3. Oleum is extremely hard t ...
9-7-2019 at 13:21
by: woelen
Preparation of Mn3+ and Co3+
@DraconicAcid: You're right, the complex could be something based on HPO4(2-) or H2PO4(-). I did not ...
3-7-2019 at 11:22
by: woelen
Preparation of Mn3+ and Co3+
As a side check, I would also try adding a few drops of dilute permanganate solution to conc. sulfur ...
2-7-2019 at 11:19
by: woelen
Preparation of Mn3+ and Co3+
Cobalt(II) is not easily oxidized to cobalt(III) with only water as ligand. Hydrogen peroxide does n ...
24-6-2019 at 12:07
by: woelen
Potassium or sodium perooxide synthesis
I agree with AJKOER. Any alkali salt of an organic acid, which contains oxygen, will lead to formati ...
21-6-2019 at 07:17
by: woelen
Chromium VI woes and what to do with an unknown chromium III mixture
it might be that the pellets get covered by some insoluble layer of Cr(OH)3, which covers the interi ...
14-6-2019 at 04:52
by: woelen
UNBELIEVABLY CHEAP microscopes
It most likely is too good to be true, but I ordered one. You can never lose more than $13 or so wit ...
13-6-2019 at 22:54
by: woelen
Ruthenium(III) chloride - RuCl3
Use bleach to dissolve the so-called Ru-hydroxide. It most likely is RuO2.xH2O. This stuff is quite ...
8-6-2019 at 12:53
by: woelen
Chemistry Memes
For me the same. No Instagram.
4-6-2019 at 07:24
by: woelen
Dangers of 0.1N NaOH in Eye?
Also keep in mind that 0.1 M NaOH is very dilute. This is only appr. 0.4% by weight. No real issue. ...
4-6-2019 at 07:19
by: woelen
Rename "Legal and Societal Issues" to accomodate chemistry related news?
No, I see no reason to have a dedicated section for that. Most of the news is about some fool doing ...
3-6-2019 at 11:36
by: woelen
Pottery grade materials purity (NiO and K2Cr2O7)
The nickel oxide most likely is not NiO, but Ni2O3. If it is black, then it is Ni2O3, if it is green ...
3-6-2019 at 11:32
by: woelen
PbI2 and electrolysis questions
Electrolysis of a solution of PbI2 will not work in practice. theoretically, you get I2 at the anode ...
3-6-2019 at 11:20
by: woelen
sharing Awesome Chemical Pictures (Read first comment)
That sample of uranyl nitrate is beautiful.

@Ubya: Uranyl ion has uranium in its +6 oxidation sta ...
3-6-2019 at 03:13
by: woelen
Whats the best way to obtain Sodium Bisulfite NaHSO3?
As far as I know, solid sodium bisulfite does not exist. The product they sell as bisulfite is the m ...
2-6-2019 at 23:59
by: woelen
Preparation of cyclo-hexasulfur
I have done more searching on internet about hexasulfur. There is not much info, but the following i ...
31-5-2019 at 10:28
by: woelen
Metal oxides
For eBay it is most practical to have PayPal. It works very well and I think more than 50% of all my ...
29-5-2019 at 06:59
by: woelen
Metal oxides
The material you show in the aukro website really looks like nickel sulfate. Nickel sulfate has quit ...
29-5-2019 at 04:11
by: woelen
Metal oxides
Cr2O3 is very inert. The only way to release the Cr(3+) ions is by dissolving it in molten NaOH or i ...
28-5-2019 at 23:57
by: woelen
Reduction of Phenyl-2-nitropropene with Al/Hg failed. Why??
Let me add one thing.

Some compounds have no general use in home chemistry or other hobby applic ...
28-5-2019 at 23:49
by: woelen
The moment (or moments) that made you realize you had a passion for chemistry
As a kid I already had interest in all kinds of technology and science. I read books about space, pl ...
27-5-2019 at 10:56
by: woelen
Looking over the border: EU-Regulations
I boil down small quantities and do experiments on a ml-scale. Do you really think that someone, who ...
27-5-2019 at 09:38
by: woelen
Shelf life of some organic reagents.
For many many chemicals the shelf life is limited, not due to its own decomposition, but due to reac ...
26-5-2019 at 23:02
by: woelen
sharing Awesome Chemical Pictures (Read first comment)
That's interesting. How much solvent did you need for this extraction? And what solvent did you use? ...
26-5-2019 at 22:44
by: woelen
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