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Tungsten metal plus piranha solution?
I don't have access to 50% H2O2, the max I can get is 27%. Yes, TIG electrodes; the one I'm using is ...
24-8-2019 at 03:00
by: stamasd
Tungsten metal plus piranha solution?
See that's the kind of information that I could have used before starting. :) ^^
What I found by m ...
23-8-2019 at 13:07
by: stamasd
Tungsten metal plus piranha solution?
Yes, less ammonia should work. The reaction appears to proceed vigorously enough at RT when enough p ...
23-8-2019 at 07:19
by: stamasd
Tungsten metal plus piranha solution?
So, lesson learned: the "basic" piranha solution can be every bit as violent as the acid one.

Thi ...
23-8-2019 at 04:27
by: stamasd
Tungsten metal plus piranha solution?
Next step: after a further 2h in which nothing happened, I added another 10ml H2O2 to the room tempe ...
22-8-2019 at 12:16
by: stamasd
How do you keep your lab notebook?
Here's what I do. I don't claim it's the best method, this is what works for me.

I use a very ad ...
22-8-2019 at 10:38
by: stamasd
Tungsten metal plus piranha solution?
So the latest update: i checked at 1.5h, the bubbling had stopped. The flask was still warm though n ...
22-8-2019 at 10:21
by: stamasd
Tungsten metal plus piranha solution?
So here's my ongoing experiment. Just started it but so far it's going very well.

2.35g piece of ...
22-8-2019 at 08:43
by: stamasd
Tungsten metal plus piranha solution?
Good luck! Depending on how it goes I'll prepare my own experiment tomorrow.
Also I assume you mean ...
21-8-2019 at 18:00
by: stamasd
Tungsten metal plus piranha solution?
Thanks for trying it. I have the chemicals too but it's night time here so I won't be able to try un ...
21-8-2019 at 15:09
by: stamasd
Tungsten metal plus piranha solution?
Does anyone have experience with reacting metallic tungsten with piranha solution? My ultimate goal ...
21-8-2019 at 14:29
by: stamasd
Notre Dame Smoke
Well the above seems to be a thermite explosion, Al and lead oxide (sold in many parts of the world ...
8-5-2019 at 02:11
by: stamasd
Cleaning copper oxides from Native Copper?
[rquote=605500&tid=146524&author=mayko]What about ammonia?[/rquote]

Ammonia is indeed ver ...
7-5-2019 at 19:04
by: stamasd
Notre Dame Smoke
I was young and stupid and mixed pyrotechnics with heavy metals. That was about 30 years ago. But I ...
7-5-2019 at 18:53
by: stamasd
Identification of a mystery metal
The most accurate method to quickly determine the composition of a metal piece is by spectroscopy. S ...
7-5-2019 at 15:39
by: stamasd
Notre Dame Smoke
Huh only found this thread now. I've been sure since the moment I first saw that yellow smoke that i ...
7-5-2019 at 15:23
by: stamasd
DIY Gamma Spectrometer with MCA
Just a quick update on the SiPM, I was recently able to acquire one through OnSemi. Wasn't cheap, $1 ...
20-2-2019 at 09:12
by: stamasd
Sea water@£60/l at Amazon
[rquote=590686&tid=134039&author=MrHomeScientist]Ah but it's not just natural sea water, it' ...
20-2-2019 at 08:53
by: stamasd
Reducing copper hydroxide
Another option is to use dextrose, or any substance with an aldehyde group. Cu2+ oxidizes the aldehy ...
30-1-2019 at 03:39
by: stamasd
Deep Eutectic Solvents (OTC Ionic Liquid)
I forgot to mention in the post above that the liquid's impedance seemed to vary nonlinearly with th ...
28-1-2019 at 15:44
by: stamasd
Deep Eutectic Solvents (OTC Ionic Liquid)
A little (belated) update on my chrome alum/urea/boric acid/water liquid above. I stuffed it in a dr ...
27-1-2019 at 08:34
by: stamasd
Alright looking for insight
I prefer the benzene ring representation without double links:
[img]https://upload.wikimedia.org/wi ...
24-12-2018 at 15:34
by: stamasd
Alright looking for insight
I tend to mentally represent the benzene structure as a ring covered on both sides by fuzzy discs. T ...
24-12-2018 at 04:24
by: stamasd
Camphor reduction to borneol/isoborneol
[rquote=566221&tid=110282&author=unionised]These
"known not to work" and
"The hard part ...
21-12-2018 at 06:26
by: stamasd
Camphor reduction to borneol/isoborneol
[rquote=566170&tid=110282&author=Σldritch]Dithionite reduces ketones to alcohols and can be ...
21-12-2018 at 06:19
by: stamasd
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