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How toxic is H2S?
Well, the good news is, that I am fine.
The next step is to convert that into hydrosulfuric acid. I ...
28-1-2021 at 07:34
by: vmelkon
How toxic is H2S?
How toxic is H2S?
I made some Al2S3 by direct reaction of the elements.
I took a couple of whiffs ...
27-1-2021 at 20:35
by: vmelkon
Experiments with liquid air
[rquote=651759&tid=156761&author=Morgan]Not that I have any idea what would happen but what ...
21-12-2020 at 17:00
by: vmelkon
Experiments with liquid air
[rquote=651598&tid=156761&author=EliasExperiments]Hi I've made a video about experiments wit ...
20-12-2020 at 16:58
by: vmelkon
Neon yellow precipitate from electrical contacts
Can you collect some in a very tiny metal spoon or glass spoon. Heat it in a flame and see if you ca ...
17-12-2020 at 22:01
by: vmelkon
Bank card – gold plated
[rquote=650816&tid=156636&author=itsallgoodjames]My guess is that it's now possible to get a ...
8-12-2020 at 19:26
by: vmelkon
Bank card – gold plated
I was surprised because it is just a bank card and I assume that they are intended to be used for 5 ...
4-12-2020 at 17:15
by: vmelkon
Bank card – gold plated
Hello guys,
This is just information for those who want to do gold extraction from electronics.

...
28-11-2020 at 18:56
by: vmelkon
Something fun: Picking a random atom in a biomolecule and tracing it back to CO2
I'm not sure.
Perhaps use CO2 where the carbon atom is a different isotope. Perhaps use C14.
When ...
22-10-2020 at 20:50
by: vmelkon
NEWS: 3M competition - viruses - COVID-19
Hello,
What do you guys think of this:
https://www.indiawest.com/news/global_indian/texas-indian-a ...
19-10-2020 at 20:46
by: vmelkon
Glass cola bottles and metal caps
I suppose it is due to economics. It is cheaper to melt and reshape plastic than steel and glass.
B ...
23-5-2020 at 17:18
by: vmelkon
Glass cola bottles and metal caps
Yes, beer bottles have the same steel caps.
PET is cheep and plastics like polyethylene, polypropyl ...
23-5-2020 at 09:13
by: vmelkon
Glass cola bottles and metal caps
This is perhaps not a chemistry question. Perhaps it has to do with physics or economics.

Why do ...
22-5-2020 at 20:44
by: vmelkon
Is electrolysing brine a viable method of HCL production?
H2SO4 is a common chemical. All cars have it.
15-9-2019 at 20:17
by: vmelkon
Reaction between Lime Sulfur and HCL
[rquote=622609&tid=153783&author=teodor][rquote=622604&tid=153783&author=woelen]I us ...
15-9-2019 at 20:12
by: vmelkon
hotplate performance
I don't have a hot plate but I use to use a halogen bulb, 300 W, to boil water, in a RBF, 500 mL or ...
27-8-2019 at 19:01
by: vmelkon
What caused these salt crystals to appear
A long glass tube in the style of a fractional distillation column with some glass beads should be a ...
17-8-2019 at 20:10
by: vmelkon
Producing and handling solid sulphuric acid?
There is this page:
http://www.sulphuric-acid.com/techmanual/Properties/properties_acid_freezingpt. ...
10-8-2019 at 12:42
by: vmelkon
Calcium and chromate
Probably not. According to this video, you need a very acidic solution to make trichromate
https:// ...
3-8-2019 at 18:38
by: vmelkon
Am241 and beta radiation
Thanks guys. That explains it.
2-8-2019 at 17:52
by: vmelkon
Calcium and chromate
[rquote=619495&tid=152728&author=CELamCheng]I put some calcium nitrate into slightly acidifi ...
2-8-2019 at 12:53
by: vmelkon
Am241 and beta radiation
It would mean that Np237 turns into Pa233 which beta- decays to U233.
Is my geiger counter really d ...
2-8-2019 at 12:30
by: vmelkon
Am241 and beta radiation
I am talking about Am241 from smoke detectors.
I have not opened brand new smoke alarms. I have onl ...
2-8-2019 at 07:29
by: vmelkon
Li ion batteries same size but different capacities?
[rquote=619209&tid=152602&author=fusso]I have some LIs from 2 battery packs, they have the s ...
30-7-2019 at 16:14
by: vmelkon
Glass tubes
If you want a very hot torch that uses air instead of pure oxygen, there is this.
https://www.homed ...
23-7-2019 at 19:34
by: vmelkon
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