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Silver from silver plate
Also, direct heating of AgNO3 will reduce it to elemental Ag. This can be much faster and easier.
16-1-2018 at 09:31
by: weilawei
Glassware in the Mail
USPS is typically accurate.
16-1-2018 at 09:25
by: weilawei
Fire & Explosion risk vs. scale
Boiling chips are porous and become saturated over time, leading to eventual superheating. I have bo ...
11-1-2018 at 14:12
by: weilawei
How do I best conduct a recrystallization when the impurities are similar solubilities as the product?
A mixed solvent recrystallization might work here with a system like ethanol and water. It'll act mo ...
10-1-2018 at 06:24
by: weilawei
Can butane melt silver?
If you have silver nitrate, heat it to 440 C for total decomposition to elemental Ag.
7-1-2018 at 06:40
by: weilawei
Last chemical order?
It is far cheaper to make silver nitrate than buy it. I did this recently to silver flasks for Chris ...
5-1-2018 at 15:40
by: weilawei
Last chemical order?
50lb cylinder of liquid CO2 for making dry ice to use in cooling baths.
5-1-2018 at 12:04
by: weilawei
Salting out and phase seperation
The linked paper tested dozens of salts--among them MgSO4. There's a big table several pages in (pag ...
3-1-2018 at 12:32
by: weilawei
Thermometers
NEMO-Chemistry, I sent you a U2U.
3-1-2018 at 10:38
by: weilawei
Inert test tubes & teflon (or glass) cap liners.
[rquote=500674&tid=79026&author=semiconductive]I've seen several thicker teflon tapes, I've ...
2-1-2018 at 15:37
by: weilawei
McLeod Manometer Hg issues
The manufacturer (Televac made the 2A sensor in this case.) suggests calibration with a vacuum stand ...
2-1-2018 at 10:03
by: weilawei
McLeod Manometer Hg issues
I bought a [url=https://www.frederickscompany.com/products/vacuguard/]Televac Vacuguard[/url] with a ...
1-1-2018 at 15:48
by: weilawei
250ml RBF with a bubble in the bottom?
It's hard to tell. I'm inclined to think it's the camera. That said, Deschem sells a lot of glasswar ...
28-12-2017 at 04:19
by: weilawei
"Draining" a fluorescent bulb (tube)
Cut inside a vacuum chamber and admit atmosphere gradually?

Apply heat to increase pressure?

U ...
15-12-2017 at 15:06
by: weilawei
Cleaning Silver From Enameled Hotplate Top
Yeah, but I bought it clean 5 years ago, use it all the time, and it was still clean (looked nearly ...
14-12-2017 at 04:45
by: weilawei
Cleaning Silver From Enameled Hotplate Top
I'm attempting to leave a nice clean hotplate without damage to the enamel. I have no interest in re ...
13-12-2017 at 18:10
by: weilawei
Cleaning Silver From Enameled Hotplate Top
In the course of making AgNO3 to silver flasks for Christmas ornaments, I wound up with small drople ...
13-12-2017 at 10:12
by: weilawei
My vacuum pump
If you get yourself a chassis mount transformer like [url=https://www.digikey.com/product-detail/en/ ...
8-12-2017 at 05:39
by: weilawei
Finally
Very nice! How much did the balance run you?
6-12-2017 at 14:06
by: weilawei
Vacuum Pump Foibles
Eventually? To back a GC/MS. How often do we have questions about products produced and purity? All ...
5-12-2017 at 08:17
by: weilawei
Vacuum Pump Foibles
I bought the sign at a halloween store, but you can [url=https://www.target.com/p/16-9-halloween-zom ...
5-12-2017 at 07:21
by: weilawei
Vacuum Pump Foibles
It seems I purchased Tygon with a 7/16" OD instead of 7/8". There's quite a difference in price--and ...
3-12-2017 at 16:23
by: weilawei
Vacuum Pump Foibles
I recently purchased a quite nice and proper rotary vane pump after years of lusting after one (and ...
3-12-2017 at 12:23
by: weilawei

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