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Preparation of silica sulphuric acid I think they mean a water aspirator, perhaps? So vacuum drying under a mild vacuum. Heating it w ... |
26-12-2023 at 17:48 by: Dr.Bob |
Science equipment looking for a home A long time ago I spoke to someone who had a microscale setup with mostly 10/18 and 14/10 joints. ... |
26-12-2023 at 17:44 by: Dr.Bob |
2023 Science Madness Secret Santa – The fun begins! Merry Christmas to all! I am sad as the package I sent a week ago (perhaps a bit too late for a ... |
25-12-2023 at 08:00 by: Dr.Bob |
Recovering palladium from triphenylphosphene palladium Wow, I thought I had a lot of Pdterakis that had gone bad. But the dichloride should be stable as ... |
17-12-2023 at 10:17 by: Dr.Bob |
Selling Chemicals online The challenge is that if you ship hazmat without proper training, licenses, and DOT paperwork, you c ... |
13-12-2023 at 11:28 by: Dr.Bob |
500mL 24/40 soxhlet extractor + carrying case Create a post, type a little text, and then select the preview post button, that lets you add images ... |
11-12-2023 at 11:05 by: Dr.Bob |
Science equipment looking for a home I just found anbother small box of hardware, mostly clamp holders, aka bossheads, and related items. ... |
11-12-2023 at 11:03 by: Dr.Bob |
Science equipment looking for a home If you find them just let me know what you want for them, happy to make a good deal. Thanks. |
8-12-2023 at 18:19 by: Dr.Bob |
Science equipment looking for a home Just to make things interesting, I am in the market for some #29 stoppers, like what fit onto 1L gla ... |
7-12-2023 at 18:53 by: Dr.Bob |
What is needed to store synthesised gasses in gas cylinders When I worked with Ed, he made many gases, and always condensed them into cylinders via dry ice cool ... |
30-11-2023 at 19:10 by: Dr.Bob |
Fluoromethylsulphonic derivatives Triflic acid may be mor heat stable, but it is a much stonger acid, and quite reactive. The anhydri ... |
30-11-2023 at 17:35 by: Dr.Bob |
1,4-Dioxane from Ethylene Glycol and H2SO4 Likely you made some polyethylene glycol in the process, that might happen if mostly glycol and not ... |
28-11-2023 at 18:41 by: Dr.Bob |
Why Palladium's spot price keeps dropping That's a shame, as I still have some palladium salts and metal materials. If people are every look ... |
28-11-2023 at 18:17 by: Dr.Bob |
ITER: A useful nuclear fusion experiment or a waste of money ? I would agree that many of the big fusion plans stated are not very practical, the capital costs of ... |
28-11-2023 at 18:03 by: Dr.Bob |
Extended length transfer needles I loved the 20G ones, need to order some 18G ones. Thanks. |
28-11-2023 at 17:35 by: Dr.Bob |
Science equipment looking for a home I have lots of them. I typically sell all jointed flask stoppers for for $5 each, but can make a de ... |
28-11-2023 at 12:23 by: Dr.Bob |
Anyone go to university chemistry seminars? Or view chem department profiles? I have been lucky enough to go to talks by many great scientists, from Nobel award winners to great ... |
23-11-2023 at 18:56 by: Dr.Bob |
Anyone go to university chemistry seminars? Or view chem department profiles? I used to go to many university seminars, as well as internal and external corporate ones, plus plac ... |
22-11-2023 at 17:58 by: Dr.Bob |
2023 Science Madness Secret Santa – The fun begins! Mad Hatter,
Got your postcard yesterday, it reminded me of a weekend in Vermont one winter many ... |
16-11-2023 at 17:04 by: Dr.Bob |
Why do we need so many elements (and energy) ? If you really want to see the details on energy use and sustainability, there is a somewhat depressi ... |
9-11-2023 at 11:14 by: Dr.Bob |
Distillation Newbie (my 2nd post ever!) Making an ester from the acid and alcohol is always fun, or cleaving ethyl acetate into ethanol with ... |
7-11-2023 at 10:37 by: Dr.Bob |
A foray into phenethylamines of the Shulgin kind Beautiful writeup, I wish any of the papers I try to follow was as thorough, detailed and had photos ... |
7-11-2023 at 10:33 by: Dr.Bob |
Mild alkylation via excess AgNO3 and alkyl halide That sounds like an interesting way to alkylate a tough substrate. I am not real familiar with tha ... |
7-11-2023 at 10:29 by: Dr.Bob |
Sources for buying chemicals from China It depends on what chemicals. Most things are much simpler to get from near by than from china, ot ... |
24-10-2023 at 17:14 by: Dr.Bob |
The Short Questions Thread (4) I just checked and it seemed to work fine for me:
=MOD(2387373278378,1000) provides 378 for me.
... |
18-10-2023 at 16:54 by: Dr.Bob |
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