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Hydrochloric acid causing HDPE to bubble
A little more than a year on, I have put my conc. HCl into a glass wine jug. It has worked exception ...
20-9-2020 at 18:23
by: CouchHatter
Need an adaptor for new vacuum pump
I have a spray/suck back trap for my aspirator. For hose barbs I simply drilled a hole through two b ...
17-9-2020 at 21:20
by: CouchHatter
Fume Hood Construction
How many CFM or RPM is your exhaust blower? My blower manages to cause a draft from the lab below ev ...
29-8-2020 at 17:28
by: CouchHatter
what happens to over-whipped cream?
It is well known in the (kitchen) literature that if you whip cream or eggs for too long, it becomes ...
29-8-2020 at 16:15
by: CouchHatter
Fume Hood Construction
Your hood looks solid, Abromination. I missed your followup posts. Glad I could give you some good i ...
29-8-2020 at 14:41
by: CouchHatter
Separating flammable chemicals
After finding this very nice pdf from Tennessee State Uni, I feel much better about my storage syste ...
16-8-2020 at 18:39
by: CouchHatter
Testing a fume hood?
You can use a vaneometer to measure the face velocity at several points on the sash. They aren't too ...
16-8-2020 at 18:05
by: CouchHatter
Preparation of Mononitrotoluenes (o-, p-)
By tweaking this reactions conditions, it is very easy to get a very different isomer makeup. Sounds ...
12-8-2020 at 19:52
by: CouchHatter
phosphoric acid titration
I have some 85% phosphoric acid and wanted to titrate it. I've gone through all the numbers thrice a ...
12-8-2020 at 18:42
by: CouchHatter
jacketless condenser
Sorry, I meant deschem. Friday was a long day for me.
9-8-2020 at 04:53
by: CouchHatter
jacketless condenser
I actually spent about $15 on a 200mm from Chemglass. I did think of a vigreux, but I don't own one ...
7-8-2020 at 20:21
by: CouchHatter
jacketless condenser
I am designing some apparatus for a microwave reactor and need a condenser without the jacket barbs. ...
6-8-2020 at 17:30
by: CouchHatter
Harbor freight Air Mover / Blower
FRP is cheap and semi-resistant to most stuff. Fairly rigid. That's what I'd use if I didn't use met ...
6-8-2020 at 17:27
by: CouchHatter
microwave modifications

[quote]
As to testing the setup - you need a calibrated meter, which is expensive: the crappy met ...
2-8-2020 at 16:03
by: CouchHatter
Is there any trick to get stir bars to stay centered and spin on flat bottom flasks?
A cross-shaped stirbar will fix this, at least it did for me. I thought my hotplate stirrer magnets ...
27-7-2020 at 09:07
by: CouchHatter
storing gas in water tank
The volume pales in comparison to a cylinder, and to flush head space, you need a good minute of gas ...
19-7-2020 at 19:08
by: CouchHatter
Avoiding Explosions with Fumehood's Inline Fan -Spark Hazard
Although not applicable for ductwork and a true in-line fan, I got around exposing mine to vapors by ...
18-7-2020 at 17:13
by: CouchHatter
plastic coated glass

It's funny you should say that Dr. Bob, it was very sticky! I thought it was residue from some sor ...
18-7-2020 at 17:01
by: CouchHatter
plastic coated glass
When I was going through some chemical bottles that I obtained secondhand, after I removed a label, ...
17-7-2020 at 13:58
by: CouchHatter
Steam distillation tubing size?
Consistent rate of steam generation matters more. I have used 5/16"ID to great success, but if the s ...
10-7-2020 at 03:58
by: CouchHatter
Polypropylene funnel considerations
I've used mine with 52% nitric acid and not noticed any staining. I also poured 40 mL sulfur chlorid ...
6-6-2020 at 09:20
by: CouchHatter
chlorine generator vs HCl generator
I have a supply of pool chlorinating tabs, and so I am more interested in the reaction between HCl a ...
1-6-2020 at 14:54
by: CouchHatter
Worries about Cl in small scale electrolysis
It can be neutralized with a NaOH trap, but I'm not familiar with electrolysis. Unless you're workin ...
28-5-2020 at 19:29
by: CouchHatter
Acetone storage?
Not sure what bottle sizes you think are small - do you need 1 or 4 liters for "small reactions"? My ...
23-5-2020 at 19:53
by: CouchHatter
Newe YouTube Video: Methyl Iodide Synthesis with Aluminum Foil
Cool that you're putting yourself out there! If everything went according to plan it wouldn't be as ...
20-5-2020 at 20:23
by: CouchHatter
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