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Author: Subject: Pretty Pictures (2)
Lion850
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[*] posted on 23-7-2021 at 18:45


Ketchup?


No….wet chromium picolinate :)

B5118AA7-11C1-499A-8C9C-FFAF5E9F93F7.jpeg - 858kB
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CaCl2
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[*] posted on 1-9-2021 at 10:57


Some pictures of my attempts at making YInMn blue.


The first attempt ended up reddish brown, don't know if it was the materials I used or something else. (Made the yttrium oxide from an ebay element sample, didn't convert the manganse dioxide to manganese(III) oxide first.)

On my second attempt I first got a gray material covered with a thin bright yellow layer. After re-grinding it and heating it more (this time without it being covered so it got lots of air.), when I took it out of the furnace it looked completely black at first but as it cooled it finally gained a nice blue color.

I had almost lost hope of ever achieving blue at that point.



Red.jpg - 500kB Yellow.jpg - 596kB Blue.jpg - 619kB
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infrablue
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[*] posted on 2-9-2021 at 16:13


CuSO4 reacting with KCl in aqueous solution.

20210902_164800_HDR.jpg - 293kB
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[*] posted on 2-9-2021 at 16:33


Quote: Originally posted by CaCl2  
On my second attempt I first got a gray material covered with a thin bright yellow layer. After re-grinding it and heating it more (this time without it being covered so it got lots of air.), when I took it out of the furnace it looked completely black at first but as it cooled it finally gained a nice blue color.

It looks great! The color is well saturated.

[Edited on 2021-9-3 by infrablue]
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Lion850
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[*] posted on 2-9-2021 at 20:18


The interesting color difference between cobalt and nickel nicotinate tetrahydrates vs the anhydrous salts

07B1650B-614B-41C2-B254-78666AE67BD8.jpeg - 2.7MB
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Bedlasky
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[*] posted on 19-10-2021 at 20:18


My girlfriend gave me empty bottles which are perfect for making alcohol burners :D. Left is H3BO3 in EtOH, right is LiCl in EtOH (in reality it looks more red, on the photo it looks like calcium flame :().

Just short question - does H3BO3/EtOH burner create significant amount of ester? I just wondering if I doesn't create some B2O3 aerosol in the room.

DSC03959.JPG - 5.7MB




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itsallgoodjames
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[*] posted on 21-10-2021 at 07:23
Very colorful picric acid synthesis from salicylic acid




20210928_180714.jpg - 2.1MB

20210928_173404.jpg - 2.7MB

20210929_070741.jpg - 3.2MB

Very colorful picric acid synthesis from salicylic acid. It went from colorless to vibrant red to orange (the pictures aren't in order), then when it was added to cold water went the expected picric acid yellow. The last image is the recrystallization of it




Nuclear physics is neat. It's a shame it's so regulated...

Now that I think about it, that's probably a good thing. Still annoying though.
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Sulaiman
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[*] posted on 21-10-2021 at 11:15


Quote: Originally posted by Bedlasky  
My girlfriend gave me empty bottles which are perfect for making alcohol burners
methanol with a nice wick gives an almost invisible flame,
unlike ethanol which has a yellow tint that makes the desired colours less intense.
its a big difference.




CAUTION : Hobby Chemist, not Professional or even Amateur
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Bedlasky
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[*] posted on 24-10-2021 at 10:01


I also tried methanol later. This time I replaced LiCl with CuCl2. And yes, flame has much better colour.



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[*] posted on 24-10-2021 at 17:00


Quote: Originally posted by Bedlasky  
I also tried methanol later. This time I replaced LiCl with CuCl2. And yes, flame has much better colour.


Yea, LiCl makes a pleasing red with methanol as seen here briefly in this bottle I used.
https://youtu.be/OUsha3uFPAA
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Bedlasky
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[*] posted on 24-10-2021 at 17:57


Yeah, I really love that red lithium flame. Everytime I read something about coloured flames or pyrotechnics, everyone always use strontium for red flames, but lithium make more intense, richer red flame (and also that particular shade of red look nicer than strontium red).

[Edited on 25-10-2021 by Bedlasky]




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DraconicAcid
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[*] posted on 3-11-2021 at 17:04




CuSO4xls.jpeg - 540kB




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[*] posted on 3-11-2021 at 17:06


Hydrated manganese(II) sulphate

MnSO4xls.jpeg - 1024kB




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karolus28
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[*] posted on 22-11-2021 at 12:57


potassium chlorate crystal

IMG_9272.JPG - 3.4MB




Hi, please read about exif data.
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[*] posted on 22-11-2021 at 22:30


Quote: Originally posted by Bedlasky  
alcohol burners... left is H3BO3 in EtOH... does H3BO3/EtOH burner create significant amount of ester?

IIRC H3BO3 is used as a quick test to distinguish methanol from ethanol, with methanol the flame is green, but it does not color significantly ethanol
you should not rely on such test too much, e.g. if the result is negative (no green flame) you are still not safe to drink such alcohol... I'm writing this because we all here are of course chemists but some alcohol drinker(s) may visit this forum while looking for the information how to distinguish these 2 alcohols
I wonder why the esterification proceeds with methanol and not with ethanol, whether it is because of kinetics/polarity/solubility or because common ethanol usually contains water (most of available ethanol is azeotrope, anhydrous ethanol is very rare). If the reason is the second case then adding something like 5% water into methanol should prevent green color of the flame while using anhydrous ethanol should color the flame to green.




If there is a heaven, it seems not to be materially based. Does chemistry exist there and if yes, how does it look like? Are there good souls well supplied with laboratory equipment, glass, chemicals and information?
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[*] posted on 9-12-2021 at 16:47


Discovered some fluorescent marbles among my mom's collection the last time I visited. The green & white ones are radioactive so I assume it's uranium. It's the milky part that fluoresces, though, which is different from eg depression glass. No idea what the orange is.

fluorescentMarbles_whiteLight.jpg - 101kB fluorescentMarbles_UV.jpg - 117kB




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Admagistr
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[*] posted on 9-12-2021 at 17:07


Rubies in corundum crucible with MoO3;)

IMG_1014.JPG - 441kB

[Edited on 10-12-2021 by Admagistr]
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[*] posted on 9-12-2021 at 17:11


Rubies in platinum dish.

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[*] posted on 31-1-2022 at 13:01



After a fairly long battle with cat converter substrate (legitimately sourced!), I'm now the proud possessor of some Palladium Chloride.


Maybe I shouldn't hit the dab before I post as I can't get the image to post' Here's a link. https://photos.app.goo.gl/jr8xHkNmJEpGKyEz5
[Edited on 1-31-2022 by arkoma]

[Edited on 1-31-2022 by arkoma]

[Edited on 1-31-2022 by arkoma]




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[*] posted on 31-1-2022 at 21:36


Oooohhh. Very nice.

In the lab today, we oxidized fluorene (not fluorine, obviously). One of the students managed to turn it purple when dissolving it in glacial acetic acid. No idea how that happened.



PurpleFluorene.jpg - 203kB




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[*] posted on 1-2-2022 at 21:24


pic

palladiumchloridenoexif.jpg - 1.2MB




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[*] posted on 18-2-2022 at 13:52


Aminoguanidine nickel perchlorate


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[*] posted on 18-2-2022 at 14:31


Quote: Originally posted by DraconicAcid  
Oooohhh. Very nice.

In the lab today, we oxidized fluorene (not fluorine, obviously). One of the students managed to turn it purple when dissolving it in glacial acetic acid. No idea how that happened.



https://en.wikipedia.org/wiki/Fluorene#Acidity. This article may be of some interest. Many different colored compounds are based on polyaromatics.
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[*] posted on 21-2-2022 at 03:26


I am a fan of the "still life" genre in art. I was always amazed how a painter can catch some ordinary mess with proper light angle and color to make from ordinary household items a piece of art.
It's a pity that painters never use a mess in a chemical laboratory as a subject. It's also a pity that I am not an artist but still, I am a great master of making a mess. So, once bored with a clean-up I've made my own still-life picture.

naturmort.jpg.jpg - 546kB
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[*] posted on 21-2-2022 at 10:18


Quote: Originally posted by CharlieA  
Quote: Originally posted by DraconicAcid  
Oooohhh. Very nice.

In the lab today, we oxidized fluorene (not fluorine, obviously). One of the students managed to turn it purple when dissolving it in glacial acetic acid. No idea how that happened.



https://en.wikipedia.org/wiki/Fluorene#Acidity. This article may be of some interest. Many different colored compounds are based on polyaromatics.

I'm pretty sure it's not the acidity of fluorene that's responsible here- it may be far more acidic than most hydrocarbons, but not in a protic solvent like GAA.




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Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
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