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How to discover if something is made of Magnesium?
Idunno, but it works. Pure Mg always turned black while neither AM50/60 or AZ61/91 reacted. I suspec ...
23-1-2019 at 14:18
by: Fulmen
How to discover if something is made of Magnesium?
The silver nitrate test works fine, I've tried it a number of times. It is fairly specific to pure M ...
23-1-2019 at 10:29
by: Fulmen
Unconventional Shaped Charges
True, but it's not as simple as it sounds. The trick is holding the part, I guess it could be glued ...
12-1-2019 at 15:14
by: Fulmen
Unconventional Shaped Charges
Don't get me wrong, that's good performance. I've drawn some liners myself and it's not as simple as ...
12-1-2019 at 14:11
by: Fulmen
How to repair a thermocouple?
My bad, I meant the standard fine electronics solder. I suspect it acted more like an adhesive, and ...
6-1-2019 at 18:02
by: Fulmen
How to repair a thermocouple?
In my experience twisting and soldering works fine without any special flux. At least for "single us ...
6-1-2019 at 13:02
by: Fulmen
How to repair a thermocouple?
If it's used for low temperature you can solder it.
6-1-2019 at 10:57
by: Fulmen
Copper oxide
Draconic: You're right. Heating is enough to convert the hydroxide to oxide, at least with an excess ...
3-1-2019 at 12:30
by: Fulmen
Filtering hydroxides, how to make them behave?
Precipitated insolubles can be hard to handle. Hydroxides can be especially bad as they sometimes fo ...
30-12-2018 at 03:25
by: Fulmen
Oxalic Acid Danger
True, but you don't usually eat the leaves. The stalks have only 0.25% or so, although plants damage ...
28-12-2018 at 08:44
by: Fulmen
Oxalic Acid Danger
Also, spinach contain appr 1% OA.
28-12-2018 at 05:52
by: Fulmen
Oxalic Acid Danger
I've also seen OA listed as "extremely toxic", but Wikipedia has the following to say:
"In humans, ...
27-12-2018 at 23:01
by: Fulmen
Copper oxide
That has not been the case in my experiments. Gels tend to produce extremely fine particles, to the ...
26-12-2018 at 12:33
by: Fulmen
Can we travel back in time really?
[rquote=568840&tid=117013&author=Antineutron]Still can't get it[/rquote]
Then you need to r ...
25-12-2018 at 11:14
by: Fulmen
Best method for absorption or scrubbing of gases from air
This is a common technique used in a wide array of industrial applications. Any good process enginee ...
18-12-2018 at 13:44
by: Fulmen
Oxalate from formate?
Sounds interesting, but it's a little too ambitious for me.
17-12-2018 at 01:24
by: Fulmen
I need help with optoisolators. . .
Why the aversion against dividers? How 'bout LM3xx regulators?
16-12-2018 at 10:13
by: Fulmen
Oxalate from formate?
Whatever, I don't see it as germane to this topic. My initial focus was to investigate formates as a ...
16-12-2018 at 08:39
by: Fulmen
Oxalate from formate?
I'm sure you're right. It was nevertheless too impure for my taste, so I didn't see any other choice ...
15-12-2018 at 10:56
by: Fulmen
Oxalate from formate?
I ended up reprocessing everything via the calcium/sulfuric acid-route. It's a bit more wasteful, bu ...
15-12-2018 at 08:35
by: Fulmen
Oxalate from formate?
Idunno, I heated it until it melted to a glass. There seemed to be some black insoluble matter in it ...
11-12-2018 at 13:43
by: Fulmen
Oxalate from formate?
The numbers are in, and they have me somewhat confused. Weight loss upon drying is consistent with t ...
11-12-2018 at 12:52
by: Fulmen
Oxalate from formate?
Fusso: :P

Drying at ambient takes it's sweet time. It feels dry, but it's still loosing weight ev ...
10-12-2018 at 13:21
by: Fulmen
Will leaving stuff on an electronic balance decalibrate it?
It's quite possible. Any material under strain can creep over time. Structurally it's not a big prob ...
9-12-2018 at 14:14
by: Fulmen
Oxalate from formate?
LOL.

After some rough calculations and a little guesswork I started with 25g of sodium oxalate a ...
9-12-2018 at 02:06
by: Fulmen
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