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Unknown blue/grey copper II salt?
The dark red powder is copper metal. At the strongly acidic conditions of your experiment you certai ...
22-5-2019 at 04:45
by: woelen
Mercuric Chloride Synthesis Success?
This does not work well. HgCl2 is only sparingly soluble. It may prevent complete dissolution of all ...
21-5-2019 at 10:53
by: woelen
What to do with a bottle of 60% HF?
Why do you order chemicals when you do not know what to do with it? Especially HF is really nasty. T ...
21-5-2019 at 02:04
by: woelen
Mercuric Chloride Synthesis Success?
This is a nice synthesis. Your product must be quite pure. The yellow color is not strong and a tiny ...
20-5-2019 at 23:22
by: woelen
sharing Awesome Chemical Pictures (Read first comment)
It indeed is an intermediate color. CrO3 is darker.
I can make a picture of K2Cr3O10 besides some C ...
20-5-2019 at 11:58
by: woelen
sharing Awesome Chemical Pictures (Read first comment)
I made K2Cr3O10 and ampouled this.


I made this chemical by dissolving K2Cr2O7 and some CrO3 in ...
18-5-2019 at 12:55
by: woelen
sub carbonate of ammonia?
This can be ammonium bicarbonate, NH4HCO3.
Most often, however, it refers to ammonium carbonate, (N ...
18-5-2019 at 10:25
by: woelen
Dichloromethane
The point is clear ;)
Every young boy (or girl) does stupid things every now and then. It happened ...
17-5-2019 at 11:05
by: woelen
Dichloromethane
I think it is very unwise to sniff CH2Cl2 or CHCl3 and it is even more stupid to sniff CCl4. I think ...
17-5-2019 at 01:13
by: woelen
KBr on ebayuk £15 for 1kg
Good quality red P is 50 to 60 euros per kg.
I am wary of buying it from really cheap sources, chea ...
16-5-2019 at 22:47
by: woelen
Attempt to make (CH3NH3)2Cr2O7
@zed, clearly_not_atara: Methylamine is quite stable with respect to oxidation. It is not easily oxi ...
16-5-2019 at 22:41
by: woelen
Do we need a separtate forum for lab safety and waste treatment?
It's OK to me to add such a subforum. I would like to make it a broad forum, with a title like

" ...
16-5-2019 at 01:41
by: woelen
Potassium Trioxalatochromate III
It's not as risky as hexavalent chromium, but keep in mind that oxalic acid and oxalates also are (s ...
15-5-2019 at 23:17
by: woelen
Usage of sulfuric acid instead of sodium bisulfate
I think that you will like this page as well:

http://woelen.homescience.net/science/chem/exps/KBr ...
15-5-2019 at 23:04
by: woelen
Usage of sulfuric acid instead of sodium bisulfate
Just mix the KBrO3 and the liquid above it and add the acid to that mix. You need to shake a long ti ...
15-5-2019 at 12:55
by: woelen
Attempt to make (CH3NH3)2Cr2O7
I recently obtained some methylamine and used this in a nice experiment in which I made the perchlor ...
14-5-2019 at 05:33
by: woelen
Ethylene diamine perchlorate
I know of the HNO3 method, but nitric acid is forbidden in the EU since 2016. You cannot purchase it ...
14-5-2019 at 03:38
by: woelen
Growing Lead iodide crystals help!
But this only happens when you have a very small amount of PbI2 in the liquid. Otherwise you certain ...
14-5-2019 at 03:27
by: woelen
Ethylene diamine perchlorate
MeNH2 does not form a carbonate (at least not in appreciable amounts). I once tried this by putting ...
14-5-2019 at 00:19
by: woelen
Usage of sulfuric acid instead of sodium bisulfate
Yes, you can use H2SO4, it even is better. I would first dilute it to 50% or so and then add it to t ...
13-5-2019 at 23:31
by: woelen
Growing Lead iodide crystals help!
If you boil the liquid with PbI2, cover the beaker or test tube loosely with a paper tissue. Any vap ...
13-5-2019 at 23:28
by: woelen
Cleaning Marble
Ferric fluoride complexes are colorless. If your marble is exposed to HF, then you may have reaction ...
12-5-2019 at 12:35
by: woelen
Ethylene diamine perchlorate
[rquote=180793&tid=13174&author=mnick12][...]woelen, interesting expiriments! Have you tried ...
12-5-2019 at 12:22
by: woelen
What happens to bonding during nuclear decay?
@clearly_not_atara: Very good answer, which sounds perfectly plausible.

I have one little remark. ...
10-5-2019 at 10:36
by: woelen
Heavy metals waste
I collect heavy metal waste in a bottle and if it is full, then I bring it to a municipal waste proc ...
10-5-2019 at 00:17
by: woelen
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