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troubleshooting a homemade hotplate
Nichrome is unusual in that its temperature coefficient of resistance is quite low - much lower than ... |
2-7-2010 at 16:03
by: densest |
Keeping crap out of my vacuum pump?
Many diaphragm pumps are powered by compressed air or hydraulic pressure (either water or oil). Thos ... |
28-6-2010 at 06:49
by: densest |
The short questions thread (2)
@mnick12 - one way to get access to chemical suppliers is: start a consulting business. Get a busine ... |
27-6-2010 at 12:58
by: densest |
distillation of acetone - failed
I'd agree with zed - do a simple distillation without reflux to get rid of the high boiling crud &am ... |
27-6-2010 at 06:39
by: densest |
Purification of plant foods
@ScienceSquirrel - thanks for the solubility table reference!!!
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25-6-2010 at 20:00
by: densest |
Phosphoryl Halides - From P4O10 & Halide Salts
RBFs are still a good idea. They are much more resilient against scratches than conical flasks.
I ... |
25-6-2010 at 19:51
by: densest |
Iodine ASC crystals for sale
Iodine is on list 1 in the USA. A DEA permit is required for possession or use. Amateurs are extreme ... |
25-6-2010 at 09:40
by: densest |
Acetic anhydride preparation
@watson.fawkes - Schott 8448? Hmmmm.... thanks!
@peach - working borosilicate requires really goo ... |
24-6-2010 at 04:28
by: densest |
Acetic anhydride preparation
@peach - scientific glassblowing is fun, but it takes a -lot- of practice. The equipment required de ... |
21-6-2010 at 15:19
by: densest |
What is white spirit?
All of these are petroleum distillates. Google is your friend. The Merck Index is often a better fri ... |
21-6-2010 at 09:22
by: densest |
Keeping crap out of my vacuum pump?
Activated charcoal is a good filter material to remove chemically active substances but it is not go ... |
17-6-2010 at 06:42
by: densest |
Welding and Chemistry, Can you teach me?
@sedit - I don't know where you are, but I believe in the US and EU your employer must give you adeq ... |
15-6-2010 at 20:16
by: densest |
25 years later 25000 times more value for the money
@woelen - the modeling you mention sounds very interesting - are there any key books or papers or pe ... |
15-6-2010 at 07:21
by: densest |
Welding and Chemistry, Can you teach me?
I'd really recommend looking in your local library for DIY welding books. They'll introduce you to a ... |
14-6-2010 at 17:31
by: densest |
Welding and Chemistry, Can you teach me?
There are a lot of books about the practical aspects of welding. The "Machinists Handbook" (now in i ... |
14-6-2010 at 16:57
by: densest |
Home labs and legal issues
KClO4/Al is an interesting case. The larger the pile, the higher the combustion velocity. Once the p ... |
12-6-2010 at 10:44
by: densest |
Harbor freight rotary vane vac pumps $75-90...
Tips for using rotary vane pumps:
They make oil mists when pumping large volumes of air. Either p ... |
11-6-2010 at 10:23
by: densest |
Thiourea Dioxide --> better than borohydride?
I've seen synthetic camphor in 1-ounce packages in pharmacies (chemists' shops) in the US. It's also ... |
9-6-2010 at 12:01
by: densest |
Making Liquid Nitrogen
In the US, welding supply stores are usually gas supply stores as well. I bought a good quality dewa ... |
8-6-2010 at 17:54
by: densest |
Sodium Metal
@kcl04 - In many regions, the word "chemical" is considered equivalent to "poison", "explosive", or ... |
7-6-2010 at 11:12
by: densest |
concentrating sulfuric acid electrolytically
[url]http://www.docstoc.com/docs/41773598/Sulfurless-Electrolytic-Concentration-Of-Aqueous-Sulfuric- ... |
2-6-2010 at 19:13
by: densest |
Water-based lubrication
The propylene glycol (PG) evaporates relatively quickly at skin temperature and isn't that viscous. ... |
2-6-2010 at 08:38
by: densest |
KNO3 from feces
Mega-scale is interesting because manure disposal is a big problem and a "drop-in" reactor with usef ... |
1-6-2010 at 15:48
by: densest |
KNO3 from feces
Thanks to The WIZard for the clue: Comp. Rend. Acad. Sci. Paris, 142, 1239-. 1244. MUNTZ, A., ET LAI ... |
1-6-2010 at 13:40
by: densest |
sodium-dichlor-iso-cyan-urate | What uses ?
In acid solution both Na-DCCA and TCCA will oxidize Au -> Au+++ (along with many other metals). I ... |
1-6-2010 at 10:08
by: densest |
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