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How do I best conduct a recrystallization when the impurities are similar solubilities as the product?
[rquote=503497&tid=79655&author=Electra][rquote=503486&tid=79655&author=DraconicAcid ... |
11-1-2018 at 23:11
by: DraconicAcid |
How do I best conduct a recrystallization when the impurities are similar solubilities as the product?
[rquote=503483&tid=79655&author=Electra]
I understand the logic behind that, but what is th ... |
11-1-2018 at 20:30
by: DraconicAcid |
How do I best conduct a recrystallization when the impurities are similar solubilities as the product?
You don't need to alkylate, acetylate or do anything fancy to separate the two. If it's 90% of the ... |
11-1-2018 at 00:14
by: DraconicAcid |
Drying dichloromethane with magnesium sulphate?
It depends on how dry you need it. For many purposes, just distilling will be enough. When I was d ... |
10-1-2018 at 07:29
by: DraconicAcid |
Question about Iodine beads
That's weird, because it only melts under pressure. Maybe they melt it under a liquid that it's not ... |
6-1-2018 at 17:30
by: DraconicAcid |
Found an old Aldrich catalog.
I think I had that catalogue- I was given one in my first year of college, and that was around that ... |
6-1-2018 at 12:49
by: DraconicAcid |
Synthetic Quartz Crystals - Alternate methods?
To get silica from Si(eg)2 would involve either hydrolysis or pyrolysis, I would guess.
The "liqu ... |
5-1-2018 at 17:47
by: DraconicAcid |
Synthetic Quartz Crystals - Alternate methods?
[rquote=502717&tid=79403&author=elementcollector1]Having read that paper, I can't find any r ... |
5-1-2018 at 11:59
by: DraconicAcid |
Nickel salts and compounds
You might also find that it works better in a solvent that will dissolve iodine (I've reacted zinc w ... |
5-1-2018 at 11:25
by: DraconicAcid |
Drying IPA
I suspect you'd have significant quantities of sulphuric acid remaining dissolved in the alcohol. |
4-1-2018 at 14:08
by: DraconicAcid |
Synthetic Quartz Crystals - Alternate methods?
That looks like it doesn't dissolve silica so much as react with it to form a soluble species- I hav ... |
3-1-2018 at 20:00
by: DraconicAcid |
Fe oxalate complexes
The complex is photosensitive. If you make it in concentrated enough solution, it should crystalliz ... |
2-1-2018 at 22:02
by: DraconicAcid |
Purifying FeSO4 (Ferrous Sulfate) solution, filtering & removing acid & crystalizing
I think that if you want to purify it by crystallization, it's easier to add ammonium sulphate and c ... |
31-12-2017 at 17:31
by: DraconicAcid |
Super oxidizer: combination of periodate and peroxodisulfate
[rquote=502046&tid=72333&author=Σldritch]If you heat it with some weak reducing agent you s ... |
31-12-2017 at 11:44
by: DraconicAcid |
Weird Color in Esterification Reaction
My students do this every year, and the purple is very common- it might be from iron impurities, or ... |
30-12-2017 at 14:01
by: DraconicAcid |
Weird Color in Esterification Reaction
That happens all the time- there are some intermediates and byproducts which are very strongly colou ... |
30-12-2017 at 12:32
by: DraconicAcid |
Iron acetate to carbonate?
What you probably have is a mixture of rust and basic iron(III) acetate. I'm not sure how stable ir ... |
30-12-2017 at 10:54
by: DraconicAcid |
Identifying CuCl (Copper(I) Chloride)
Why shouldn't it? If you have excess hydrogen peroxide, you would get CuCl2, but with excess copper ... |
29-12-2017 at 17:22
by: DraconicAcid |
Identifying CuCl (Copper(I) Chloride)
So it seems like CuCl, except for it not reacting with HCl. Weird. CuI and CuBr are also white, bu ... |
28-12-2017 at 14:51
by: DraconicAcid |
The Short Questions Thread (4)
Don't use HCl on copper- it will react if there is oxygen from the air dissolved in solution. Bette ... |
28-12-2017 at 13:07
by: DraconicAcid |
Identifying CuCl (Copper(I) Chloride)
It's really easy to tell the difference between CuCl and CuCl2. The former is white and insoluble i ... |
28-12-2017 at 12:43
by: DraconicAcid |
Production of Cu (I) Cl with household chemicals. Problems.
[rquote=501183&tid=78599&author=semiconductive]
Copper sulfate precipitated with sodium car ... |
21-12-2017 at 18:22
by: DraconicAcid |
Acetonitrile uses
I'm surprised grignards are stable in acetonitrile. I had thought that it was possible to deprotona ... |
19-12-2017 at 17:53
by: DraconicAcid |
Volcanic CO2 riddle
Have you never heard of equilibrium? That CO2 that's been produced over four billion years has also ... |
19-12-2017 at 12:43
by: DraconicAcid |
Production of Cu (I) Cl with household chemicals. Problems.
Have you checked the pH of that solution?
Anyway, I found a table that gives reduction potentials ... |
19-12-2017 at 12:41
by: DraconicAcid |
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