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KI + HCl + sample + Starch -> yellow colour, why?
Using KI + HCl is not sufficient to produce iodine I2. The yield is miserable. It is also necessary ... |
20-9-2021 at 09:12
by: Maurice VD 37 |
Why technetium and promethium doesn't have a stable isotope?
There is a law in nuclear physics stating that if two nuclides are isobar (same mass number) and ne ... |
17-9-2021 at 10:56
by: Maurice VD 37 |
Help with Cs2cucl4 (cesium tetrachlorocuprate II) preparation
Don't use CuCl ! You should start from CuCl2 !!
What do you want to do with this compound ? Cesium ... |
16-9-2021 at 06:28
by: Maurice VD 37 |
KI + HCl + sample + Starch -> yellow colour, why?
Are you sure of the quality of your starch ? Because the word HONIG means honey in German. And honey ... |
16-9-2021 at 06:21
by: Maurice VD 37 |
Nickel Acetate from Nickel Chloride
Are your sure that a reaction did happen in your mixture ? It the reaction did proceed as you said, ... |
14-4-2021 at 11:34
by: Maurice VD 37 |
Nickel Acetate from Nickel Chloride
Are you sure that HCl has been eliminated from your mixture ? Who knows ? Maybe NiCl2 is still here ... |
13-4-2021 at 11:42
by: Maurice VD 37 |
Something strange happened to my CuSO4 solution
1. Dehydrated copper sulfate can of course rehydrate in the presence of water.
2. Dissolving copper ... |
13-2-2021 at 03:18
by: Maurice VD 37 |
Acid mixtures that dissolve gold
What do you mean by "being better to dissolve gold" ? All these mixtures will produce chlorine gas. ... |
12-2-2021 at 13:49
by: Maurice VD 37 |
Something strange happened to my CuSO4 solution
Your precipitate may be partially dehydrated copper sulfate. I see that you have concentrated you so ... |
10-2-2021 at 13:38
by: Maurice VD 37 |
K2CO3 / KOH from Wood ashes ?
The analysis I have reported describe the composition of the solid ashes, before any leaching or tre ... |
10-2-2021 at 13:30
by: Maurice VD 37 |
K2CO3 / KOH from Wood ashes ?
The wood ashes have the following composition :
40 - 70 % CaCO3
5 - 10% K2CO3
5 - 10 % Na2CO3
5 ... |
9-2-2021 at 13:29
by: Maurice VD 37 |
Any way to tell if there is bromobenzene in benzene?
Instead of TLC, I would use gas chromatography (GC) |
6-2-2021 at 05:22
by: Maurice VD 37 |
Reaction of Ammonium Chloride and Sodium Bicarbonate
First don't write NH5CO3, as if the five H atoms were similar. No ! You should write NH4HCO3. This s ... |
6-2-2021 at 03:41
by: Maurice VD 37 |
Low(est) boiling point salts?
Silicon tetrachloride boils at 57°C. Silicon tetra bromide boils at 153°C.
Tin tetrachloride boil ... |
2-2-2021 at 13:59
by: Maurice VD 37 |
Copper (I) carbonate
Seems to be impossible. Copper(I) chloride is not soluble into water !!! How can you mix its solutio ... |
2-2-2021 at 13:43
by: Maurice VD 37 |
How to calcine aluminum but not copper.
@ Pneumatician.
The verb "to calcine" comes from the latin : calcis, the chalk.
It has two meaning ... |
16-1-2021 at 13:07
by: Maurice VD 37 |
How to calcine aluminum but not copper.
What do you mean with "to calcine Al" ? Do you want to evaporate a solution of an aluminum salt ? Do ... |
13-1-2021 at 12:47
by: Maurice VD 37 |
Oxalate Stain Removal from Stainless Steel Question
If I summarize your observations, you started by trying to remove red iron stains from stainless ste ... |
8-1-2021 at 13:24
by: Maurice VD 37 |
Is it normal to get low yields all the time, or am I a bad organic chemist?
I have the tendency to think that Vogel's book reports exaggerated yields. Personally I have always ... |
26-12-2020 at 09:02
by: Maurice VD 37 |
yellow calcium hydroxide + ammonium nitrate
The yellow color is probably some iron impurity present in the chalk. CaO and Ca(OH)2 are usually ma ... |
18-12-2020 at 12:58
by: Maurice VD 37 |
How to Separate NaOH Impurities? (NaI, Sodium Iodide)
If you heat the mixture NaI + NaIO3 at 500°C, NaIO3 will be transformed into NaI, but any amount of ... |
14-12-2020 at 02:00
by: Maurice VD 37 |
How to Separate NaOH Impurities? (NaI, Sodium Iodide)
Try to add ammonium chloride NH4Cl. If there is NaOH in your salt, it will produce NaCl and NH3 whic ... |
12-12-2020 at 04:49
by: Maurice VD 37 |
Gunpowder (Potassium Chlorate) from Bleach
I would be cautious about the competence of the experimenter. He says that NaOCl can be read "N H O ... |
4-12-2020 at 08:28
by: Maurice VD 37 |
Elemental iodine from KI and bisulfate - results
The chemical equation is :
4 NaHSO4 + 4 KI --> Na2SO3 + K2SO3 + Na2SO4 + K2SO4 + 2 I2 + 2 H2O
... |
3-12-2020 at 14:12
by: Maurice VD 37 |
Chloroform without bleach
Use bleaching powder instead of bleach. Bleaching powder is made of calcium hypochlorite Ca(ClO)2, w ... |
1-12-2020 at 12:58
by: Maurice VD 37 |
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