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Even HDPE Bottles Aren't Immune to Chemical Attack
Btw., could you please change the size of your pictures? Scale them down to 800 pixels width or so, ...
28-9-2020 at 23:59
by: woelen
Even HDPE Bottles Aren't Immune to Chemical Attack
Is that black stuff sulfuric acid? Looks awful.
I recently purchased 4 liters of drain cleaner acid ...
28-9-2020 at 23:54
by: woelen
Some chemistry pictures from a long time forum lurker
Welcome! Very good to see you here on sciencemadness. Your contributions will be appreciated!
28-9-2020 at 04:32
by: woelen
2020 Secret Santa Sign In
Matching me with someone in the EU also would be nice for me, but it is not mandatory.
28-9-2020 at 00:32
by: woelen
Sodium sulphite spontaneous oxidation
The heptahydrate is the form, which was sold 40 years ago. As a teenage boy I also used the heptahyd ...
26-9-2020 at 23:57
by: woelen
2020 Secret Santa Sign In
I have seen the Secret Santa threads the last few years, and I have seen the fun of it.
Now I am in ...
25-9-2020 at 03:58
by: woelen
Has anyone dissolved Titanium Dioxide?
If you manage to get some titanium dissolved in its +4 oxidation state, then you could try HCl + zin ...
24-9-2020 at 23:33
by: woelen
Using industrial chemical processes at home
These processes are industrial processes and they are so for a good reason. Some processes simply ar ...
24-9-2020 at 07:15
by: woelen
Has anyone dissolved Titanium Dioxide?
TiO2 is very inert. You can get it dissolved, but only in molten salts like NaHSO4. You need quite s ...
23-9-2020 at 23:17
by: woelen
Is it too much to ask to wear a mask?
I believe that these masks are totally useless. I never used one and never will use one. You cannot ...
19-9-2020 at 10:01
by: woelen
Ammonium bromide route for rare earth bromides
Ce2O3 is not oxidizing. Cerium can exist in two oxidation states, +4 and +3. It is quite strongly ox ...
19-9-2020 at 09:43
by: woelen
Collection of bromine preps
At room temperature, in 100 ml of water, appr. 3 grams (which is appr. 1 ml) of bromine dissolves.
...
17-9-2020 at 23:04
by: woelen
Life on Venus?!
PH3 indeed does not inflame in contact with air, and it needs to be ignited before it burns. But the ...
16-9-2020 at 23:47
by: woelen
Life on Venus?!
The atmosphere of Venus is oxidizing. Not as much as Earth's, but close to it. At the surface the ma ...
14-9-2020 at 23:16
by: woelen
Collection of bromine preps
No, if you have BrCl in your Br2 you won't be able to distill this out of the mix in a satisfactory ...
10-9-2020 at 11:34
by: woelen
Strange explosive vapor. I call (Poppy gas) named as a kid
IPA and hypochlorite do form an unstable isopropyl hypochlorite. This compopund is a volatile yellow ...
8-9-2020 at 22:50
by: woelen
Well-known reaction of KMnO4 and HCl: how well-known is it really?
The use of copper(II) as catalyst indeed is very interesting. I still had a test tube standing, with ...
7-9-2020 at 10:39
by: woelen
Well-known reaction of KMnO4 and HCl: how well-known is it really?
I tried the experiment with copper(II) as a catalyst and indeed, this makes a difference!
I added a ...
7-9-2020 at 02:11
by: woelen
Well-known reaction of KMnO4 and HCl: how well-known is it really?
Interesting remark about catalysts, such as Ag(+) or Cu(2+). I'll try the reaction with one of these ...
5-9-2020 at 11:15
by: woelen
Well-known reaction of KMnO4 and HCl: how well-known is it really?
Most of you will know the easy method of making chlorine gas of good purity by adding solid KMnO4 to ...
4-9-2020 at 11:17
by: woelen
Strange explosive vapor. I call (Poppy gas) named as a kid
The role of the dishwashing liquid is to keep the foam more stable.
The gaseous products almost cer ...
4-9-2020 at 04:04
by: woelen
Notation
Usually, chemical equations are written with integral (integer) coefficients for the compounds (here ...
3-9-2020 at 04:08
by: woelen
Synthesis of potassium metaperiodate by persulfate method
Interesting synthesis. It would be even more interesting if you could use KI as startting material. ...
1-9-2020 at 23:24
by: woelen
Latest chemical order?
I ordered 4 liters of clean colorless H2SO4 (96%). I still have some H2SO4, but I want to be sure to ...
31-8-2020 at 03:30
by: woelen
Caution: Making bromine from TCCA and ammonium bromide does not work
TCCA and ammonia (in any form, including ammonium ion) is a dangerous combination. The same is true ...
30-8-2020 at 23:24
by: woelen
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