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Mass and Weight
Interesting videos! Any chance you might investigate whether skin oil changes then result? I handle ...
15-10-2019 at 12:08
by: Heptylene
"Horworka" distillation link
By breather channel do you mean an opening at the top of the condenser? This is definitely planned, ...
6-10-2019 at 10:45
by: Heptylene
Improvised column head
So I've thought about this a bit more. What this distillation link is lacking is a thermometer inlet ...
6-10-2019 at 04:51
by: Heptylene
"Horworka" distillation link
I'll keep looking on ebay for distillation heads, though I'd like it in 29/32 (or 29/42) which is an ...
30-9-2019 at 12:12
by: Heptylene
"Horworka" distillation link
Has anyone ever seen a piece of glassware like this? A distilling link according to Horworka, whoeve ...
29-9-2019 at 06:16
by: Heptylene
presentation about explosives to school
Yeah demonstrations with actual explosives are probably not a good idea.

Explosives are still an ...
8-9-2019 at 06:00
by: Heptylene
How to accurately determine NH3 concentration?
[rquote=613421&tid=150389&author=Ubya][rquote=613409&tid=150389&author=Sulaiman]Disp ...
7-9-2019 at 07:10
by: Heptylene
Weird Question about KMnO4
Maybe KMnO4 is completely insoluble in DCM? I have a hunch it's poorly soluble at best. Maybe you we ...
5-8-2019 at 11:33
by: Heptylene
Building a Ionization Chamber
Your questions is pretty vague. It's like me saying "I want to build a mass spectrometer and I need ...
4-8-2019 at 03:19
by: Heptylene
99.5-100.5% Pure!
[rquote=619547&tid=152727&author=wg48temp9][rquote=619513&tid=152727&author=Heptylen ...
3-8-2019 at 02:10
by: Heptylene
99.5-100.5% Pure!
I found a nice reference book on uncertainties: [url=https://www.eurachem.org/index.php/publications ...
2-8-2019 at 12:41
by: Heptylene
Chemical Removal of Copper from Graphite Gouging Rods
1M H2SO4 + some H2O2 should work very well.
CuCl2/HCl should work well too, but might leave some Cu ...
2-8-2019 at 04:47
by: Heptylene
What is phosgene/phosphine?
[rquote=619309&tid=152659&author=fusso]I can't believe someone with >400 posts would ask ...
31-7-2019 at 09:40
by: Heptylene
What dimmer to use with Glas-Col heating mantle in Europe
For my tube furnace with a similar power output I'm using one of those ebay dimmers, supposedly rate ...
4-7-2019 at 00:39
by: Heptylene
How accurate are solution density measurements?
@brubei: Your approach only takes into account the random error right?

As you said you would also ...
21-6-2019 at 02:21
by: Heptylene
How accurate are solution density measurements?
The density \(\rho\) of a sample is calculated from its mass \(m \pm \delta m\) and volume \(V \pm \ ...
20-6-2019 at 06:02
by: Heptylene
How to clean a separatory funnel?
You could try hot sodium persulfate + 254 nm UV (from a germicidal lamp). It cleans glass very well ...
17-6-2019 at 06:08
by: Heptylene
Synthesis for hydrolaxamine to ketamine
We don't "give" people methods to "convert" things here. Do some research, show you're interested in ...
12-6-2019 at 05:46
by: Heptylene
Non-friable high temp fabric options?
Carbon fiber maybe?
7-6-2019 at 06:00
by: Heptylene
Whats the best way to obtain Sodium Bisulfite NaHSO3?
Which aldehyde is it you want to purify exactly? Without that information I can't tell you anything. ...
1-6-2019 at 09:48
by: Heptylene
Whats the best way to obtain Sodium Bisulfite NaHSO3?
Apparently you have an equilibrium between metabisulfite and bisulfite in water: Na2S2O5 + H2O <- ...
1-6-2019 at 06:26
by: Heptylene
Whats the best way to obtain Sodium Bisulfite NaHSO3?
@netnofeels: I have extracted cinnamaldehyde from cinnamon bark oil by making the bisulfite adduct. ...
1-6-2019 at 06:03
by: Heptylene
H2O2 as O2 source for propane/acetylene torch?
Yeah feeding pure oxygen into a compressor full of oil sounds like a recipe for a massive explosion. ...
31-5-2019 at 11:29
by: Heptylene
[Lab] Setup [opinions?]
[rquote=613488&tid=150373&author=DavidJR]
I had one just like that, but it died recently - ...
25-5-2019 at 05:21
by: Heptylene
[Lab] Setup [opinions?]
Be careful no to make the bikes rust if you handle HCl and such.

Also is that a KNF vacuum pump I ...
24-5-2019 at 12:11
by: Heptylene
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