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how was chemistry performed in the 1800's, prior to analytical equipment?
amazing reply nicodem, thanks for the explanation!

and thank you bert for the links, i'm taking a ...
11-4-2014 at 10:33
by: EmmisonJ
how was chemistry performed in the 1800's, prior to analytical equipment?
i'm just curious how chemists of the olden days were able to have any grasp at all on what it is tha ...
9-4-2014 at 06:37
by: EmmisonJ
separation of nitroethane from 2-nitropropane?
the boiling points of nitroethane (112-116C) and 2-nitropropane (120C) are too close to fractionate, ...
8-2-2011 at 00:15
by: EmmisonJ
which is the better reflux condenser? allihn vs friedrich
nice pic Mildronate, that condenser looks good for reflux but i've heard of condensers that look li ...
31-7-2010 at 22:29
by: EmmisonJ
which is the better reflux condenser? allihn vs friedrich
thanks BromicAcid, off-gassing is the opposite of what i want to happen. i will be refluxing a wide ...
30-7-2010 at 18:27
by: EmmisonJ
which is the better reflux condenser? allihn vs friedrich
from the little bit of info i've read it seems like the friedrich is the way to go. i have a 200mm ...
30-7-2010 at 05:18
by: EmmisonJ
best way to store anhydrous IPA?
simple, easy question, just wanted to check with the experts.

i'm assuming the best way for long- ...
28-6-2010 at 20:38
by: EmmisonJ
Cheapest Hydroxylamine
i've read a few different msds but was curious on a couple practical aspects of hydroxylamine. it se ...
2-12-2009 at 07:47
by: EmmisonJ
solubility of MeOH in toluene/xylene
2 quick questions...

does anyone know what the solubility of MeOH in toluene/xylene is?

what a ...
30-11-2009 at 19:48
by: EmmisonJ
clamp for 14/20 neck?
[rquote=166223&tid=13048&author=watson.fawkes][rquote=166172&tid=13048&author=Emmiso ...
20-11-2009 at 11:49
by: EmmisonJ
clamp for 14/20 neck?
like entropy51 said when doing vacuum distillations there really is no worry but i use it for atmosp ...
19-11-2009 at 05:18
by: EmmisonJ
clamp for 14/20 neck?
allow me to clarify with my photoshop skillz :D

the pic on the left is the way it is now, my clam ...
18-11-2009 at 12:42
by: EmmisonJ
clamp for 14/20 neck?
all of my clamps are way too big for the neck of a 14/20, i'm trying to find a clamp to fit around t ...
16-11-2009 at 21:05
by: EmmisonJ
changing flasks during vacuum distillation (no cow, etc)?
ah there's the post i was looking for. i tried searching and didn't manage to find it.

thanks Ar ...
15-11-2009 at 17:13
by: EmmisonJ
changing flasks during vacuum distillation (no cow, etc)?
i'm no stranger to distillations however i'm about to attempt my first vacuum distillation so this i ...
15-11-2009 at 11:30
by: EmmisonJ
Switching rcving flask in vacuum distillation
what about a 3-way adapter that goes in between the tubing from the vacuum adapter to the vacuum pum ...
6-11-2009 at 08:46
by: EmmisonJ
Cheapest Hydroxylamine
[rquote=162303&tid=12630&author=ammonium isocyanate]You can get it at http://www.photoformul ...
3-10-2009 at 15:01
by: EmmisonJ
Glassware supplier recommendations
[rquote=161407&tid=12770&author=felis][rquote=161386&tid=12770&author=basstabone]Kan ...
22-9-2009 at 11:15
by: EmmisonJ
need help calculating a 1M HCL solution
I'm trying to figure out the math to get 225ml of a 1M HCL solution from 33% HCL. I was almost able ...
27-8-2009 at 11:27
by: EmmisonJ
Fume cupboard door imploded
good show! where'd you end up putting the air inlets?

like what was mentioned earlier i would ju ...
18-8-2009 at 05:19
by: EmmisonJ
Fume cupboard door imploded
i'd love to see it :)
17-8-2009 at 07:22
by: EmmisonJ
methanol azeotrope vs methanol polarity
i see EtOH shares an azeotrope with the solvents in question (benzene/heptane/toluene) as well which ...
7-8-2009 at 15:49
by: EmmisonJ
methanol azeotrope vs methanol polarity
if someone wanted to extract a small amount of a water immiscible liquid (say like 10ml or so) from ...
7-8-2009 at 12:01
by: EmmisonJ
ketone-bisulfite product recrystallization
[rquote=159169&tid=6118&author=Nicodem]I don't know about any other bisulfites, but sodium b ...
2-8-2009 at 20:39
by: EmmisonJ
ketone-bisulfite product recrystallization
would it be possible to use a sodium bisulfite solution to recover ketones/aldehydes from a nonpolar ...
2-8-2009 at 08:56
by: EmmisonJ
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