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Ways to precipitate sodium ions?
Hypophosphite reduces copper(II) to the hydride, you get fine crystals of CuH, when a solution of a ...
14-7-2020 at 05:23
by: woelen
KCN synthesis. Care to share your thoughts?
I would not bubble HCN in an aqueous solution of KOH. In alkaline water solution, the cyanide fairly ...
13-7-2020 at 04:58
by: woelen
Missing persons
Nicodem, good to see that you are fine. I understand what you mean with being occupied with other th ...
12-7-2020 at 09:08
by: woelen
Amazing fluorescent precipitate of copper(I) with propargyl alcohol
I tried a similar experiment with a different reductor.

I dissolved some propargyl alcohol in wat ...
10-7-2020 at 12:36
by: woelen
18K Gold sould I drop it in aqua regia.
I find this a very fishy story anyway. Someone stopping in the streets, in front of a total stranger ...
10-7-2020 at 05:24
by: woelen
Copper cyanurate (and other cyanurates}
I would not call that pink. I have the impression that the pure compound would be (nearly) white, bu ...
10-7-2020 at 01:32
by: woelen
sodium or potassium dichromate.
I would go for 250g of K2Cr2O7 and 100g of Na2Cr2O7.2H2O. Then for $40 you have both.
10-7-2020 at 01:25
by: woelen
sodium or potassium dichromate.
I personally like potassium dichromate more than the sodium salt. It is anhydrous, the sodium salt i ...
9-7-2020 at 23:38
by: woelen
Super simple sulfuric acid from bisulfate->pyrosulfate->hydrolysis?
Wikipedia is notalways right when it comes to specific properties of chemicals. I have corrected qui ...
9-7-2020 at 23:30
by: woelen
Super simple sulfuric acid from bisulfate->pyrosulfate->hydrolysis?
Adding sodium pyrosulfate to water simply leads to formation of sodium bisulfate:

Na2S2O7 + H2O - ...
9-7-2020 at 06:28
by: woelen
U.S. based suppliers that will sell to individuals?
I have good experience with https://www.artcraftchemicals.com/
It is in New York, geared towards ph ...
8-7-2020 at 23:51
by: woelen
18K Gold sould I drop it in aqua regia.
This sounds too good to be true. Current spot price of gold is well over US$ 50 per gram. I expect i ...
8-7-2020 at 23:47
by: woelen
Amazing fluorescent precipitate of copper(I) with propargyl alcohol
I purchased some propargyl alcohol, because of its triple bond. It is the simplest compound, availab ...
8-7-2020 at 23:31
by: woelen
Weird smell from Zn + FeSO4 reaction vessel?
@AJKOER: I think that all of this is nitpicking in reverse. Theoretical issues, far from the practic ...
8-7-2020 at 23:24
by: woelen
Amazing fluorescent precipitate of copper(I) with propargyl alcohol
I just did an experiment with propargyl alcohol, which has structure HC≡CCH2OH.
It has a triple b ...
7-7-2020 at 11:36
by: woelen
What causes the delays in a HCl+xNO3+Cu reaction?
I noticed the same with adding KBr or NaBr to 60% HNO3. If you do this, no reaction occurs initially ...
7-7-2020 at 07:27
by: woelen
Weird smell from Zn + FeSO4 reaction vessel?
Pick out the metal pieces of zinc from the mix and then just dump the remaining liquid mix in the to ...
7-7-2020 at 05:24
by: woelen
Methanol vapours
If you do this outside on the balcony, then the vapors will disappear very quickly. After your exper ...
6-7-2020 at 23:52
by: woelen
Weird smell from Zn + FeSO4 reaction vessel?
I think that there are impurities in either the zinc, or the FeSO4, or both, which produce smelly co ...
6-7-2020 at 23:39
by: woelen
Anhydrous oxalic acid
I doubt whether the method with carbon tetrachloride is better than Bedlasky's method. CCl4 is not e ...
6-7-2020 at 02:01
by: woelen
Bisulfite adduct and reagents?
The sulphur world is a complicated one. There are many compounds which you can obtain, all of them o ...
5-7-2020 at 23:03
by: woelen
Bisulfite adduct and reagents?
The bisulfite ion does not exist in the solid state. Sodium bisulfite is not a chemical you can buy. ...
5-7-2020 at 12:42
by: woelen
KClO3 and H2SO4 reaction
It might be that dilution in a lot of sulfuric acid makes the mix less explosive. The OP used 1 gram ...
3-7-2020 at 13:41
by: woelen
Blowing 100k on science equipment
I agree with Dr.Bob that it is best to stay away from the bigger tools. These tools of course are fa ...
2-7-2020 at 23:29
by: woelen
A day of summer chemistry.
@j_sum1: With copper nitrate it does not work, there is too much water of crystallization in copper ...
2-7-2020 at 23:12
by: woelen
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