Questions asking for identification of compounds in photos, by description, or given by a formula.
-3
votes
0answers
22 views
Can someone help me identify this solution of water and sulfur? [on hold]
I came across a certain compound recently in class, but I’m not sure at all what exactly it is. It’s a solution of water and sulfur (sulfur compound, maybe?) and...something, I guess. I’m guessing ...
-1
votes
0answers
28 views
Distinguish between two blue solids [closed]
I would like to know how to deduce the identity of two blue solids by making them undergo chemical reactions. Copper (II) Sulfate and Copper (II) Nitrate. I already know of their reactions with Barium ...
-3
votes
0answers
28 views
How can I distinguish between Sodium Carbonate, Lead (II) Nitrate and Ammonium Chloride? [closed]
I am currently trying to figure out how to identify one of three solid substances, any help would be appreciated.
EDIT: I need to use chemical reactions for identification. I accidentally wrote copper ...
0
votes
2answers
33 views
Molecule identification [closed]
I'd really like to know what compound this formula is and don't know if there's any software for that matter, if anyone could help me :)
(With a sw suggestion or the compound identification)
0
votes
1answer
35 views
Which compound results in the following products when mixed with AgNO3 and Chlorinated water
I'm currently working on attempting to identify a particular substance of which I know the cation is Na, however I am unsure as to what the corresponding anion is based off of these characteristics.
...
4
votes
2answers
100 views
Which white powder first “boils off” and then catches fire at high temperatures?
I'm a high school student doing a project where we need to identify chemicals and one of the substances had a very unique change when heated.
Before heating it was an extremely fine, flour-like white ...
0
votes
1answer
27 views
CAS numbers for salts of molecules
Often times Pharma molecules come as different salts where the Cation changes. Do these have typically the same or different CAS numbers?
e.g. Take Glucosamine Hydrochloride.
https://en.wikipedia....
0
votes
1answer
72 views
Structure of the compound C9H7O2Cl?
A compound having formula $\ce{C9H7O2Cl}$ (O = oxygen) exists predominantly in enol form (A) and also in keto form (B). On oxidation with $\ce{KMnO4}$ it gives m-chlorobenzoic acid as one of the ...
6
votes
0answers
72 views
What are metal zip tags and belt buckles made of?
Metal zipper tags and belt buckles melt very easily and can be melted by heating it in the stove for 5 minutes. But other metals like aluminium refuse to melt even after hours.
If you leave it ...
1
vote
0answers
76 views
White compound, insoluble in water, turns pink and then white again on adding water
Which white, ionic compound(s) that is insoluble in water turns pink when you add only a little of water but white again when you add more water?
I know that the cation is one of the following:
$$\...
0
votes
0answers
74 views
Identification of compound of potassium and oxygen based on flame color
When a flame test was carried out on A, it gave a lilac flame. Also, a glowing splint was re-lit during testing. This assumes that the substituents of the compound are potassium and oxygen. Identify a ...
1
vote
0answers
69 views
What is causing a blue colour when sodium bicarbonate, vinegar and aluminium are reacted together? [closed]
My 10 year old has been experimenting in my kitchen!
The other day he wanted to know why when he reacted bicarb soda and boiling vinegar in a container with some aluminium foil, the solution turned ...
1
vote
1answer
2k views
Mixing hydrochloric acid and sulphuric acid, both concentrated
In the chemistry lab, I stupidly decided to mix hydrochloric acid and sulphuric acid, both concentrated, in a random ratio, which was about $\pu{50 ml}$.
When I poured them in one test tube, the ...
1
vote
0answers
28 views
Need help with an IR spectrum (polymer identification)
I have been given an unknow polymer and I have to identify it.
DSC measurements showed no glass transition (which means it's below room temperature) and a melting temperature at around 100-120°C. So,...
0
votes
2answers
97 views
What's this mystery acid? [closed]
Today, my dad told me about a cleaning product for membranes he bought a while ago. He told me he put his finger in it and it didn't hurt him at all, nor did it seem to damage any tissues.
But later ...
2
votes
1answer
220 views
Home test for magnesium carbonate
People that do rock climbing and weightlifting usually use magnesium carbonate on their hands to decrease slippery hands.
I would like to know how can someone that buys MgCO3 can really be sure it's ...
5
votes
1answer
347 views
What's the chemical formula of “Everitt's salt”?
According to my school textbook (which is notorious, for being in possession of several errors), a certain "Everitt's salt" is a complex that results from the reduction of Prussian Blue.
Everitt's ...
0
votes
2answers
70 views
Identification of a metal from group 2 [closed]
A chemist adds $\pu{0.115 g}$ of a group 2 element to water and the resulting solution is made up to $\pu{400 cm3}$ by adding distilled water. The equation for the reaction is shown below. $\ce{M}$ ...
2
votes
1answer
82 views
What is this glassware between flask and condenser to collect liquid?
I've been trying to identify this piece of glassware for ages now. I've been combing the internet and can't seem find anything similar. It looks like some kind of adapter/collecter/trap that sits on ...
-5
votes
1answer
109 views
Identification of an aromatic compound for a quiz [closed]
I need help identifying this structure for a puzzle. Original text was blurry, so a white overlay was added for readability, though some fragments might be different. Any help or suggestions are ...
7
votes
0answers
148 views
Brass Instrument: Dezincification or just scrubbed off?
I do own a brass instrument (a trombone). The lacquer is damaged.
I asked how to deal with it here.
Now I learned that the brass contains zinc, and there is a corrosion process called "...
3
votes
1answer
78 views
Strange green and gold coloured chemical [closed]
I have a reagent bottle with an unknown chemical that came with some other lab gear about 30 years ago, I stumbled on it again when clearing out some old stuff.
It is a standard brown glass Merck of ...
1
vote
0answers
56 views
Whats the full name of HMOBA? [closed]
I'm doing some statisitcal research and I have come across an acronym for a chemical. I have tried googling it but it comes up with very little and I can't find the name.
I only have HMOBA. Can ...
-3
votes
1answer
71 views
What molecule is this? [closed]
I have tried some only searches but I couldn't find the molecule name. Can someone identify this for me?
2
votes
1answer
78 views
How to differentiate magnetite from metallic iron?
Both metallic iron and magnetite, $\ce{Fe3O4}$, are magnetic. Now, iron is grey in color, whereas hematite is black, so that they can be distinguished visually.
Now, I have a powdery mixture of iron/...
2
votes
1answer
46 views
Structure of compound
The synthetic scheme below makes reference to a reagent $\ce{(CH_3)_3COCl}$ that is added at some points in the synthesis.
What kind of structure does $\ce{(CH_3)_3COCl}$ have? The closest ...
4
votes
0answers
58 views
Can anyone explain this condensation pattern?
What is the hair-like polymer that condenses on the caps of the plastic cell vial? Inside vial are cells in a mixture of FBS and DMSO. The vials were frozen slowly in a special isopropanol-filled ...
5
votes
0answers
57 views
Fractal patterns on water
I stored water in a bucket (of aluminium probably), and some random fractal-like patterns are formed on the water:
See here for some more pictures.
Why this happened?
I'm unable to reproduce it. ...
-1
votes
1answer
126 views
Rubber composition A13 B13 C20 F17 K11 L14 [closed]
I am looking at a rubber compound with the following description:
A13 B13 C20 F17 K11 L14
I cannot find the meaning for "A" and "L".
I am not a chemist.
9
votes
1answer
1k views
Identification: was this gallium or mercury from broken thermometer?
I had accidentally broken a thermometer against my computer screen, resulting in the splash of the silvery substance seen below:
I cannot remember whether the thermometer is a mercury-free ...
3
votes
1answer
57 views
Help identifying glassware
I am helping clean out my lab and there is some glassware that I can't identify. Attached are the photos:
Thank you!
1
vote
0answers
210 views
What is the reason that this white substance formed on these coins?
I recently did an experiment where I put lots of pennies, and a few quarters, in a mixture of vinegar and salt for three days. By the end, the pennies were dull in color and the quarters had taken a ...
-3
votes
1answer
63 views
3
votes
1answer
2k views
What is “mineral spirits”?
I'm working in a project, and for a specific thing, I need to work on a possible recovery of $\ce{HCl}$ in aqueous phase. I found a patent on the net in which they use an amine to make a complex with $...
1
vote
1answer
127 views
Measuring pH using pH paper makes solution change color
I have an unknown substance dissolved in water, and it's milky white. When I put in a pH paper, the paper shows that it is slightly basic at pH ~8. However, after putting in the pH paper, the solution ...
3
votes
1answer
73 views
What are the uses of ethyl phthalate
The last time I went to my junior college I remember seeing huge blue colored drums labeled ethyl phthalate. So just out of curiosity I decided to check upon this compound. Wikipedia entry containes ...
3
votes
4answers
2k views
Identify a molecule by structure
I have a drawing of a molecule, I want to know its name. Is there a software, or website that can help me identify the chemical? Im not a chemist, its been a decade since I had chemistry in college, ...
0
votes
1answer
154 views
Which white powders form acids when mixed with water?
I have a mystery acid which isn't citric, boric, or oxalic acid. When mixed with water, it smells pungent, like hydrochloric acid--though I haven't compared them side by side.
Which other white ...
9
votes
2answers
2k views
What is this blue crystal?
I was sorting out some old boxes in one of the rooms in my house, when I found a small container with about 10 grams of this blue crystalline powder. I assume that it contains some form of copper due ...
10
votes
3answers
572 views
What metal is this?
Does anyone know what metal this is? (right click -> "Open image in new tab" for larger image)
It has to be one of the following: magnesium, aluminum, zinc, tin, antimony, lead.
This metal was found ...
3
votes
2answers
399 views
What goes on the NFPA 704 for multiple chemicals?
If you have a chemical that is classified (Health, Fire, Reactivity) 2, 1, 2. And another chemical that is 1, 3, 2. If these two chemicals are stored together, what is put on the storage container/...
6
votes
1answer
705 views
Finding the mystery ester strucuture using NMR
I have an unknown ester with the chemical formula $\ce{C9H10O2}$ that is used as a flavoring agent in candies. It exhibits the following H-NMR and C-NMR (Attached file: unknown ester NMR)
Based on ...
0
votes
1answer
65 views
Unknown salt formed from electolysis of urine
I'm not sure what I was expecting to happen with this but I created a circuit to electrolyze various household liquids. My electrodes are copper (or at least claim to be, I think they might just be ...
0
votes
1answer
1k views
Reaction of copper (II) ion reacting with sodium hydroxide
Based on an experiment, a solution that contained $\ce{Cu^2+}$ formed a precipitate with $\ce{NaOH}$. Is this how you write the equation?
$$\ce{2NaOH + Cu^{2+} -> Cu(OH)2 + 2Na+}$$
On the ...
2
votes
3answers
283 views
Looking for a toxic substance that cannot exist at room temperature [closed]
I am writing a short story, and am trying to find a gas with the following properties:
It must have a very distinctive odor
It must be impossible for it to exist at room temperature under normal ...
0
votes
0answers
67 views
Differentiating glycerol and glycols
I have a sample of some unknown viscous liquid, obtained from a pharmacy, labeled as "glycerine". However, it did not freeze in a freezer (freezer was at around -4 Celcius), even when touched with a ...
5
votes
1answer
849 views
What is “Cresol Soap”?
I recently came across a suggestion in an old (first published 1893) book that a solution of ~1% cresol soap in water could be used as a way to store a particular kind of root without allowing it to ...
2
votes
0answers
407 views
Identity of unknown metal
I wanted figure out what the identity of this scrap metal was. It seems to be some sheet metal but Wikipedia says sheet metal can be made of a variety of metals. My dad said it might be tin so I ...
2
votes
0answers
72 views
Identifying an unknown white oxidizing powder
I am working with a unknown white oxidizing powder that melts at around 500 degrees Fahrenheit. It turns my finger green when it comes into contact with my finger for a short while. It leaves a very ...
6
votes
2answers
455 views
Identify two amines
I was reading a random text about the surface chemistry of YBaCuO superconductors. In the text, there was a table. The table had a list of several chemical compounds, including these two:
Alkyl Amine:...
