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Author: Subject: Pretty Pictures (2)
Mailinmypocket
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[*] posted on 26-11-2014 at 07:12
Selenium dissolving in sodium sulfide solution




image.jpg - 1.3MB
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j_sum1
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[*] posted on 26-11-2014 at 07:23


Mailinmypocket, that looks truly stunning. (I bet it didn't smell as good as it looks!)
Do you mind if I ask what kind of experimentation you were attempting?
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Mailinmypocket
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[*] posted on 26-11-2014 at 07:31


Thank you! The smell was typical egg fart variety :) I was going to make some selenium dioxide but got sidetracked by Woelens page on selenium and thought it looked too pretty to not try:

http://woelen.homescience.net/science/chem/exps/se_chemistry...

I also made a time lapse of selenium dust floating on top of the sodium sulfide:
http://youtu.be/hYXiRPA-Klo

[Edited on 26-11-2014 by Mailinmypocket]
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[*] posted on 26-11-2014 at 07:43


Vid looks cool too.
Unfortunately woelen's website is blocked by the security settings on my work laptop. There have been a few links to his site that I have not been able to read. I will have to get that rectified but it means a chat to the IT staff.
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Jylliana
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[*] posted on 28-11-2014 at 06:09



My silver bar remelted ^_^

I held it in a bunsen burner for a while with a pair of tongs and the silver started dripping, to catch it I placed a large beaker with cold water underneath. This is the result.




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[*] posted on 28-11-2014 at 17:19


Wow, rather pretty! And a pretty good deal of Ag there.



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[*] posted on 29-11-2014 at 02:43


The original bar was 10grams. I might have lost some because I have done some other experiments with it before melting it, but not much.



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[*] posted on 8-12-2014 at 18:36


Wow, that silver is stunning, Jylliana!

I'm new here, and just looked through this whole thread. I really enjoyed the photos, everyone! :)
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[*] posted on 8-12-2014 at 23:07


Welcome to ScienceMadness, curelom :)
I hope you enjoy it here ^_^




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[*] posted on 9-12-2014 at 17:34


This is my fave mineral, wulfenite. I took the pic at a museum in Toronto, I can't think of the name right now. i like it because it looks like peanut brittle (the mineral, not the museum.)

image.jpg - 1.8MB

[Edited on 10-12-2014 by Hellafunt]
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[*] posted on 9-12-2014 at 19:43


Hello, I am new here.
I've been teaching my self chemistry for a while now and find that I could use someone to bounce my thoughts off of once in a while.

I look forward to becoming an active member here.

I'll start things off with my own pretty picture.

Potassium nitrate crystals.

IMG_290706675326553.jpeg - 130kB

[Edited on 10-12-2014 by Atrum]
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[*] posted on 10-12-2014 at 12:06





NOT a pretty picture, actually!




Boom.
The explosion removed the windows, the door and most of the chimney.
It was the sort of thing you expected in the Street of alchemists. The neighbors preferred explosions, which were at least identifiable and soon over. They were better than the smells, which crept up on you.
-Terry Pratchett, "Moving Pictures"

It is essential that persons having explosive 
substances under their charge should never 
lose sight of the conviction that, preventive 
measures should always be prescribed 
on the hypothesis of an explosion.

Marcellin Berthelot - 1892 
Explosives and their power - Page 47
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Zyklon-A
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[*] posted on 10-12-2014 at 18:37


Welcome to the forum Atrum! I too started out teaching myself, it's a great way to learn.
Potassium nitrate is still one of my favorite compounds to recrystallize, and I just bought 5 pounds of the stuff, so I'll be crystallizing it soon.
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[*] posted on 11-12-2014 at 17:18


Thanks Zyklon.

Here are a few more from my past experiments.

1. NO2 gas
2. Luminol (made from otc chemicals)
3. Copper acetate crystals


IMG_60520126496350.jpeg - 119kB IMG_60476540110065.jpeg - 67kB IMG_60471386947462.jpeg - 89kB

[Edited on 12-12-2014 by Atrum]
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[*] posted on 11-12-2014 at 17:53


Nice pictures, Atrum! I love the copper acetate crystals. About how big are they? :)

-Mariah :)
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[*] posted on 11-12-2014 at 19:05


Quote: Originally posted by curelom  
Nice pictures, Atrum! I love the copper acetate crystals. About how big are they? :)

-Mariah :)


Thanks, they are about the size of a lima bean.
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Zyklon-A
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[*] posted on 11-12-2014 at 19:21


Nice, how'd you make the N2O4/NO2?
Is it dry?
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[*] posted on 11-12-2014 at 19:31


Quote: Originally posted by Zyklon-A  
Nice, how'd you make the N2O4/NO2?
Is it dry?


The NO2 was a by product from when I made nitric acid.
I decided to capture some of it because I thought that it looked cool.

I used a nitrate salt, HCl, and some copper. I fed the gases into cold 35% H2O2.
It is not dry.

[Edited on 12-12-2014 by Atrum]
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[*] posted on 13-12-2014 at 15:08


Some different crystalline compounds:

1. Potassium Tetraperoxochromate(V)
2. Copper(II) Chloride Dihydrate
3. TCCA (crystallized from acetone)





IMG_2027.jpg - 219kB IMG_0275.JPG - 260kB IMG_0532.jpg - 270kB




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[*] posted on 13-12-2014 at 17:20


Orgsyn says "Approximately 500 g. of cracked ice is added, and then, with mechanical stirring, the diazonium salt solution is run in as rapidly as possible. The mixture becomes a bright orangered." during the prep of phenylhydrazine. They're not kidding, man.





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[*] posted on 15-12-2014 at 08:41






Made fluorescein today :)
Unfortunately my fingers now do fluoresce as well, while I thought I worked in a really clean way :(




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[*] posted on 18-12-2014 at 04:21



Two beads of aluminum among other stuff that didn't melt properly.




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[*] posted on 18-12-2014 at 10:17


Those are really pretty pictures. Where'd the aluminum above come form, Jylliana?



My write-ups are on here...
http://www.MeltThe.Ga or http://ptp.x10.mx
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[*] posted on 18-12-2014 at 10:22


It was just aluminium foil. It does melt, but it required a lot of effort to do that, partly because my burner isn't very hot.



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[*] posted on 18-12-2014 at 14:56
Copper Crystals


I have been growing some copper crystals recently.
I use a computer power supply, 3.3v carrying about 16 amps. I use a sulfuric acid/copper sulfate bath. I am not sure about the amounts, as i have been constantly adjusting the concentration, but it is about 100g/L of copper sulfate, and enough acid to bring the pH to 2-3. Recently, Ive added 60ppm chloride (HCl) because I read on a plating forum that chloride ions inhibit dendrites, which is good for growing larger nodules.
The crystals take about 2 days to grow.

Here are some pictures, and I made a video here if you want to see more!








[Edited on 18-12-2014 by I Like Dots]
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