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YouTube Science Channels
Almost had a fire yesterday when I was messing around with superglue and shopping reciepts. I decide ...
18-1-2011 at 05:37
by: DJF90
PREPERATION OF ACIDS FROM ALKALI SALTS
Don't use sulfuric acid unless you want to gas yourself with CO!
17-1-2011 at 20:28
by: DJF90
Acidity of Oxo-acids of P
Paulings rules as I am familiar with them state that for an oxo acid (O)aE(OH)b, where a and b are i ...
14-1-2011 at 08:49
by: DJF90
Acidity of Oxo-acids of P
kmno4 - where did you find this rule? I've not seen it before
14-1-2011 at 04:56
by: DJF90
Acidity of Oxo-acids of P
We're considering the pKa1 (2.2) of H3PO4 vs the pKa (2.0 - both from bordwell pka tables) of H3PO2 ...
13-1-2011 at 09:51
by: DJF90
Acidity of Oxo-acids of P
The pKa values depend upon the theory. You might want to look at Pauling's rules and the reasoning b ...
13-1-2011 at 08:38
by: DJF90
Make Potassium (from versuchschemie.de)
Don't mix halogenated solvents with alkali metals, no matter what the temperature is. Its asking for ...
11-1-2011 at 07:08
by: DJF90
Linoleic Acid -> ... -> Hexanal
OsO4/NaIO4 is the original Lemieux-Johnson procedure. As OsO4 is terribly toxic and out of reach for ...
10-1-2011 at 02:23
by: DJF90
Linoleic Acid -> ... -> Hexanal
I'm certain Woelen has the preparation on his webpage. I dont recall HNO3 being needed.
9-1-2011 at 14:52
by: DJF90
Linoleic Acid -> ... -> Hexanal
Swern oxidation on an alkene? I don't think so... And oxidative cleavage of alkenes requires acidic ...
9-1-2011 at 13:12
by: DJF90
Desperately seeking method for ethyl bromide.
I found that HBr fumes also share a similar fruity odour.
9-1-2011 at 07:22
by: DJF90
Manganese Chloride Crystals
Here's that paper you wanted John
5-1-2011 at 16:24
by: DJF90
Synthesis of longer chain tertiary alcohols
[quote]Of course you can brominate 1-butanol but HBr isn’t cheap either…[/quote]
Hence why you ...
5-1-2011 at 13:01
by: DJF90
Converting iodides and iodates to I2
Acidify with 2M H2SO4, not concentrated acid. Then add sufficient peroxide solution (3-9%).
4-1-2011 at 02:09
by: DJF90
Alkoxide salts
Alkali metals react less violently with alcohols than they do with water. Ethanol dissolves sodium f ...
3-1-2011 at 14:47
by: DJF90
Converting iodides and iodates to I2
The NaIO3 is your oxidiser and the second equation is correct. Analogous chemistry is used also for ...
3-1-2011 at 14:16
by: DJF90
WTB Hydroxylamine hydrochloride
I didn't say its "better than a simple reflux", just that it might be more accessible. You're right ...
1-1-2011 at 12:56
by: DJF90
WTB Hydroxylamine hydrochloride
You dont need nitromethane. The preparation in Brauer uses readily available materials and there are ...
1-1-2011 at 04:40
by: DJF90
Make Potassium (from versuchschemie.de)
4 consecutive posts in under 80 minutes. No wonder this thread is 22 pages long...
30-12-2010 at 10:01
by: DJF90
WTB Hydroxylamine hydrochloride
Make it, preparation in Brauer.
30-12-2010 at 06:37
by: DJF90
synthesis of Ti and Zr halide
I think that was the whole point of the metathesis DDTea...
I dont know much about the fluorides ...
28-12-2010 at 04:42
by: DJF90
A simple extraction?
How about caffeine from tea. Theres an MIT video on youtube that demonstrates it.
27-12-2010 at 13:47
by: DJF90
catching H2S
I thought so... don't worry about it! But yeah, I suspect a 0.01M solution (if not more dilute) of l ...
24-12-2010 at 09:38
by: DJF90
Thiol preperation with Thiourea
You changed the procedure and it didn't work. Am I suprised? No. Try following the instructions next ...
24-12-2010 at 09:20
by: DJF90
catching H2S
Jor, the point of the lead nitrate was to make indicating strips. For detecting H2S in your workspac ...
24-12-2010 at 09:13
by: DJF90
[Next Page]
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Special Topics
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