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AgNO3
Thalium, I posted here a description of my experience obtaining silve nitrate from acid and scrap si ... |
3-11-2004 at 05:37
by: Tacho |
Best acid combination to erode steel.
I have never seen Caro's acid in action, but I have a feeling that it's too dangerous for ... |
31-10-2004 at 17:15
by: Tacho |
Best acid combination to erode steel.
I am willing to cut steel plates and steel pipes. More immediately, I am considering the possibility ... |
31-10-2004 at 11:56
by: Tacho |
Best acid combination to erode steel.
Using NaCl and electricity was, so far, the best method. More than a mm of steel disappeared in less ... |
31-10-2004 at 02:43
by: Tacho |
Best acid combination to erode steel.
Thanks all,
H2SO4 75% and H2SO4(75%)+H2O2(200vol, 35%?) are worse than HCl (37%)+H2O2(200vol, 35% ... |
30-10-2004 at 17:28
by: Tacho |
Ethyl Iodide
I have produced METHYL iodide a few times. The yield varies wildly with small changes in the reactan ... |
30-10-2004 at 17:19
by: Tacho |
Precipitated copper powder
What books don’t say:
Electroplating with some quality is difficult. To obtain solid metallic d ... |
28-10-2004 at 04:51
by: Tacho |
Best acid combination to erode steel.
I was considering the possibility of doing some "chemical machining" on steel. Common ste ... |
27-10-2004 at 04:25
by: Tacho |
Condutive paint powder...
I tested the vit C in 3 metal salt solutions: Circuit etching ferric chloride, nickel chloride and s ... |
26-10-2004 at 03:43
by: Tacho |
Precipitated copper powder
About quantitative yields: I didn't do any carefull measurement, but the ammount of copper prec ... |
24-10-2004 at 16:39
by: Tacho |
Precipitated copper powder
I got some reagent grade ascorbic acid and did some tests. I noticed a few things: 1) heat strongly ... |
24-10-2004 at 15:33
by: Tacho |
Coppercondensor again...
I have worked a lot with many kinds of epoxy resins.
Epoxy resin does not "melt" under ... |
20-10-2004 at 16:09
by: Tacho |
strange...
I'm a strong presence...
...But I have to re-login from time to time. On whimsy too. I gue ... |
20-10-2004 at 08:11
by: Tacho |
Precipitated copper powder
[url=http://groups.google.com/groups?q=%22copper+mirror%22&hl=en&lr=&selm=auuZ5.14028%24 ... |
20-10-2004 at 04:28
by: Tacho |
Precipitated copper powder
The vit C copper is much better looking than tha Zn copper. No matter how much you wash the Zn coppe ... |
19-10-2004 at 03:47
by: Tacho |
Precipitated copper powder
The fact is that the precipitated copper is not in a colloidal state. Its a powder, so we are talkin ... |
18-10-2004 at 08:30
by: Tacho |
Precipitated copper powder
[quote][i]Originally posted by chemoleo[/i]
<snip>
Also - I think the overall surface area o ... |
18-10-2004 at 03:08
by: Tacho |
Precipitated copper powder
Experiment:
Formic acid does NOT work.
Hydroquinone does NOT work.
Sodium Bissulfite produces a ... |
17-10-2004 at 02:50
by: Tacho |
Ammonium Dichromate Volcano
I strongly advise you to check the MSDS of these chromium salts before you mess around with them. So ... |
15-10-2004 at 09:52
by: Tacho |
Precipitated copper powder
[quote][i]Originally posted by chemoleo[/i]
<snip>
Apart from that... I rubbed the powder on ... |
15-10-2004 at 09:38
by: Tacho |
Homemade Plastics?
Methyl isocyanate is a very nasty chemical indeed. And all polyurethanes release nasty gasses when t ... |
8-10-2004 at 04:27
by: Tacho |
Substance that Melts at Room Temperature?
Phenol melts at 40,5ºC. Not exaxtly room temperature... |
7-10-2004 at 03:08
by: Tacho |
Homemade Plastics?
Just an extra note on ricin (castor) oil and isocyanates: after 24 hours , some bubbles develop in t ... |
7-10-2004 at 02:59
by: Tacho |
Not exactly homemade but...
Ricin oil reacts with isocyanates to produce a polyurethane plastic. You mix both and it hardens ove ... |
6-10-2004 at 03:31
by: Tacho |
homebrew aspirator
Sorry Mendeleev, I did not read your post carefully. I realize now you are working with tap water, s ... |
3-10-2004 at 14:06
by: Tacho |
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