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pH indicator for portland cement.
[quote][i]Originally posted by unionised[/i]
"Actually it needs to lose 2 protons to become colored ... |
26-9-2006 at 10:23
by: guy |
pH indicator for portland cement.
[quote][i]Originally posted by unionised[/i]
In very alkaline conditions phenolphthalein loses anot ... |
25-9-2006 at 12:21
by: guy |
Is teflon resistant against molten NaHSO4?
Wow ok that makes perfect sense. Now to buy another pan. Its going to be hard to pur it into anoth ... |
25-9-2006 at 12:12
by: guy |
Fehlings Solution
[quote][i]Originally posted by unionised[/i]
"I tested some fructose in a 5% aqueous solution with ... |
25-9-2006 at 12:09
by: guy |
Fehlings Solution
Ok here is my guess.
The phenyl group is electron withdrawing because it will increase resonance, ... |
24-9-2006 at 14:51
by: guy |
Is teflon resistant against molten NaHSO4?
[quote][i]Originally posted by solo[/i]
use a pyrex pie pan or a pyrex cake mold.................. ... |
24-9-2006 at 14:34
by: guy |
Fehlings Solution
It doesn't work with aromatic aldehydes? I don't see why not. I've never read about that. |
24-9-2006 at 09:19
by: guy |
Had a small fire in the lab this evening... was making ether of all things.
Why not do it outside? |
23-9-2006 at 23:44
by: guy |
Salting out
Which salts are suitable for salting out ethanol (from denatured alcohol)? I've tried some salts li ... |
20-9-2006 at 18:24
by: guy |
Is teflon resistant against molten NaHSO4?
[quote][i]Originally posted by chemoleo[/i]
Teflon is used under extremely harsh conditions, magnet ... |
20-9-2006 at 18:02
by: guy |
Is teflon resistant against molten NaHSO4?
I'm going to make NaHSO4 by heating ammonium sulfate and sodium sulfate together. I want to make a t ... |
20-9-2006 at 17:28
by: guy |
Toluene saponification?
The hydrogen on the methyl group of toluene can be deprotonated because it will increase resonance. ... |
20-9-2006 at 13:13
by: guy |
Sulfate curiosity
It would be hard since the reaction with water and bisulfate stays to the left. Ka = 1.0 e-2 |
18-9-2006 at 19:15
by: guy |
Sodium hydroxide from baking soda
Thats probably just Na2CO3. The best way is get that and react with Ca(OH)2 to ppt chalk and get Na ... |
17-9-2006 at 19:53
by: guy |
NH4NO2
I read you can do it with NH3 and O3. |
17-9-2006 at 11:08
by: guy |
What is this?
Does anyone know any information about the compound 2-oxopropane-1,3-dial?
CHO--C(O)--CHO
Some ... |
13-9-2006 at 17:43
by: guy |
What is this?
Megalomania's procedure.
"It is possible to use starch, glue, or glycerol instead of gelatin, but ... |
13-9-2006 at 12:26
by: guy |
What is this?
Red solution reacts with copper sulfate and NaOH to form a yellow-orange precipitate presumably Cu2O ... |
12-9-2006 at 22:27
by: guy |
What is this?
I tried glycerol and NaOH and glycerol with NaOCl. Both were boiled for about 10minutes. Only NaOC ... |
12-9-2006 at 19:34
by: guy |
What is this?
Man, then why did the procedure say it could be used?
[Edited on 9/12/2006 by guy] |
12-9-2006 at 13:32
by: guy |
What is this?
I attempted to make hydrazine using glycerol instead of gelatin.
When I boiled it to 1/3 the origi ... |
11-9-2006 at 19:45
by: guy |
WTF how to synthesize this?
[img]http://myspace-252.vo.llnwd.net/00817/25/22/817572252_l.jpg[/img] |
8-9-2006 at 16:32
by: guy |
Question
Which condensation products of acetone can form a brown precipiate with H2O2 and acid (vinegar in th ... |
5-9-2006 at 19:05
by: guy |
Accident
I was trying to separate the ethyl acetate from the solution using ammonium sulfate (I forgot about ... |
3-9-2006 at 21:41
by: guy |
Accident
Yeah so pretty much my house smells like acetamide because I accidently put ammonium sulfate and hyp ... |
3-9-2006 at 16:40
by: guy |
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