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Multiple bad experiences with AliExpress
Beware of these: https://www.fruugo.nl/ssd-solid-state-4tb-990-pro-m2-2280-ssd-pcie-40-nvme-gaming-i ...
25-2-2024 at 13:06
by: woelen
NO2 refusing to condense
The most likely problem of the OP is that the path between the place where NO2 is produced and where ...
25-2-2024 at 12:50
by: woelen
Experiment with algebraic integers
@Rainwater: I did not know 3blue1brown, but now that I have watched a few videos from him, I must sa ...
25-2-2024 at 12:39
by: woelen
Experiment with algebraic integers
@clearly_not_atara: The properties you give indeed are true, but things are even better.
Any monic ...
23-2-2024 at 14:04
by: woelen
Multiple bad experiences with AliExpress
Another bad experience from AliExpress. KI, which is mixed with something else. The "KI" I ordered i ...
21-2-2024 at 13:43
by: woelen
Experiment with algebraic integers
In the following three pictures I made heat plots of
1) All zeros of all reducible polynomials of d ...
21-2-2024 at 13:29
by: woelen
Laboratoriumdiscounter.nl ratings
Methylamine is not such a good reductor, actually, it's only weeakly reducing. Even dichromate is no ...
15-2-2024 at 00:30
by: woelen
How hazardous is fluorine chemistry?
I personally have done a few experiments with 48% HF, but I did not feel comfortable at all while wo ...
14-2-2024 at 11:46
by: woelen
Experiment with algebraic integers
I expect all of you know the concept of integer numbers (..., -3, -2, -1, 0, 1, 2, 3, 4, ....) and r ...
6-2-2024 at 12:52
by: woelen
Manganese cleanup and purplish smokes
It indeed is quite remarkable that H2O2 can act as a reductor, and also can act as an oxidizer. I th ...
31-1-2024 at 00:40
by: woelen
Preparation of Hydrogen Cyanide
Beautiful and very interesting set of experiments with the HCN. The experiment with the liquid evapo ...
25-1-2024 at 00:41
by: woelen
Preparation of Hydrogen Cyanide
Beautiful write-up.

Interesting to see that you can isolate such pure HCN from a an innocuous che ...
23-1-2024 at 00:46
by: woelen
Multiple bad experiences with AliExpress
With the fake As2S3, I now see that I am not the only one. Another person added a 1 star review, tel ...
22-1-2024 at 03:02
by: woelen
Multiple bad experiences with AliExpress
In the past, I purchased quite some things from eBay, but recently, the number of interesting items ...
21-1-2024 at 10:21
by: woelen
Nitric acid bottles growing exterior crystals?
It most likely is ammonium nitrate, or amine nitrates. If you have animals (pets!) around, then this ...
21-1-2024 at 09:45
by: woelen
Manganese Dioxide from Manganese Sulphate
Precipitate Mn(OH)2 from a solution of MnSO4 or Mn(NO3)2.
To this, you can add any oxidizer, which ...
18-1-2024 at 00:50
by: woelen
Can KBH4 substitute NaBH4 in ethanol/methanolic solutions for reduction of ketones to alcohol.
Mixing perchlorate and borohydride may be risky. In aqueous solution, I do not expect any issues, bu ...
15-1-2024 at 00:37
by: woelen
High Boiling Solvents for HCl Synthesis to Prevent Flask Cracking
Do you want to make dry HCl, or hydrochloric acid?

Standard sodium bisulfate, as you can buy for ...
12-1-2024 at 02:24
by: woelen
How strong is the effect of sodium ions really?
As suggested by Dr.Bob, moved thread to energetic materials section.
11-1-2024 at 06:28
by: woelen
How strong is the effect of sodium ions really?
Another option I have is making KClO3 from KCl, using MMO electrodes (I have done that in the past). ...
10-1-2024 at 05:07
by: woelen
How strong is the effect of sodium ions really?
I purchased a PbO2 anode and intend to make NaClO4 with these, by electrolysing a solution of NaClO3 ...
10-1-2024 at 04:55
by: woelen
Relative number of moles
This of course occurs much more. The simplest example is H2O2. It contains H : O = 1 : 1, but the mo ...
8-1-2024 at 07:57
by: woelen
Relative number of moles
[rquote=689072&tid=160014&author=Fulmen]Example: Al2O3 has a relative ratio of 1:1.5 but an ...
8-1-2024 at 00:46
by: woelen
Easy way to make phosphorus pentachloride with easy to get reagents
I agree with Bedlasky. I have ferrophosphorus and I have Cu3P (copper(I) phosphide). Both are quite ...
8-1-2024 at 00:26
by: woelen
Using transition metal mineral acid salts as complexing salts with alcohol or acetylene and ammonia as aliphatic amine catalysts
The term "ammine" stands for ammonia-complexes and from them it is not possible to make amines.

E ...
4-1-2024 at 03:32
by: woelen
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