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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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j_sum1
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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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The Volatile Chemist
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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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Jylliana
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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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Atrum
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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!




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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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Atrum
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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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curelom
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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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Atrum
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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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Atrum
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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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blargish
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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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UnintentionalChaos
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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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Jylliana
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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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The Volatile Chemist
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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?



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Jylliana
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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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I Like Dots
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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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