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mayko
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[*] posted on 21-7-2016 at 13:50


These lovely blue mushrooms pop up around this time of year. Turns out, they also bruise a lovely green color!

Incidentally, does anyone have protips on preserving mushrooms? I tried putting this one in a closed container with some CaCl2 but it just got slimy and grungy...

shroom_colors.jpg - 368kB




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The Volatile Chemist
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[*] posted on 22-7-2016 at 12:31


Alexleyenda, quite the colorful reaction indeed! Is the practice of indirectly siphoning product from a sigma aldrich jar common? :)



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[*] posted on 22-7-2016 at 14:00


Quote: Originally posted by The Volatile Chemist  
Alexleyenda, quite the colorful reaction indeed! Is the practice of indirectly siphoning product from a sigma aldrich jar common? :)


That's a Sure-Seal bottle. The contents are removed using a syringe, and nitrogen added through a needle so that air doesn't sneak in while contents are removed.




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[*] posted on 22-7-2016 at 22:35



Bought a lill bit of titanium (6Al 4V alloy)
IMAG7091.jpg - 738kB IMAG7092.jpg - 751kB IMAG7089.jpg - 875kB
1) nice size chunk :)
2) 7 lb 13 oz each by a kitchen scale
3) nerdy size reference

Ya, the purpose... I wanted to use it for unrelated projects and planning on using some scrap for labware. Not sure exactly what. But I havent often seen a Ti sample that big, only having wire and thin plate besides it. Thought it might be a decent share.

[Edited on 23-7-2016 by violet sin]




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Texium (zts16)
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[*] posted on 22-7-2016 at 22:38


So... what are you going to do with 16 pounds of titanium alloy? (not to say it isn't beautiful of course!)



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[*] posted on 23-7-2016 at 01:53


Quote: Originally posted by The Volatile Chemist  
Alexleyenda, quite the colorful reaction indeed! Is the practice of indirectly siphoning product from a sigma aldrich jar common? :)


As draconic said, the bottle was is fact only kept under nitrogen atmosphere to make sure it doesn't react with water or oxygen in the air. The tube and needle are connected to a nitrogen tank. That being said, something similar to what you said is quite common, to transfer with a cannula. Its a kind of needle with both ends sharp, you put one end in both flask and add a nitrogen pressure to push the liquid through the cannula. It's like using a syringe to transfer a liquid, but much easier and there are less chances of spills or whatever. You can't measure the amount transfered however, so it's used when you got to transfert the whole thing.

( http://www.chemistryviews.org/SpringboardWebApp/userfiles/chem/image/2013/2013_03/Tips_Schlenk/cannula(1).gif )

[Edited on 23-7-2016 by alexleyenda]




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Brain&Force
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[*] posted on 28-7-2016 at 09:33


GIF time! I decided to do a video of holmium acetate changing color in different lighting. It's just as dramatic in person.

<iframe sandbox src='https://gfycat.com/ifr/DefinitiveWarlikeAlaskankleekai' frameborder='0' scrolling='no' width='640' height='359.5505617977528' allowfullscreen></iframe>

If that doesn't work use this:

<iframe sandbox width="560" height="315" src="https://www.youtube.com/embed/KVAUSD3UmIc" frameborder="0" allowfullscreen></iframe>




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cool.gif posted on 3-8-2016 at 13:14


Mercury/silver nitrate solution. Pretty smal white crystals started to form at the bottom of the beaker. I suppose it is mercury(I) salt.

<img src="http://chem.pieceofscience.com/wp-content/uploads/2016/08/dianinstrom.png" alt="mercury" style="width:600px">




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[*] posted on 5-8-2016 at 03:42


Okay....so....


1) Melt Ammoniumthiocyanate....check
2) Add Ammoniumdichromate....check
3) Extract Product with hot water....check
4) Put it in the freezer....check

5) Take it out of the freezer......oh....damn it.

So there is this point where water "precipitatates" as well -.-



Prec.JPG - 47kB
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[*] posted on 5-8-2016 at 03:53


I have absolutely no clue if it's supposed to look like that since it didnt work for a friend who tested it as well but for me I got this orangle nearly glowing bright compound which is hopefully a Caffeine-complex....will need to make that again but it looks really amazing.

The second picture was something interesting I found. So there is this line on I think Wikipedia where it says that Dimanganese Heptoxide was stable in CCl4. So we made some in this solvent. The question was how to destroy it so we took it and dropped it into a container full of water. Its hard to see on the picture but this smaller vial is open and filled with Permanganate in CCl4 and around this vial is water. SInce the two dont seem to mix and the solvent is quite oily it stays inside without coloring any of the water. It lasted for a day like this then I moved the vial and it mixed.

Caffeine.JPG - 43kBMan.JPG - 31kB
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[*] posted on 5-8-2016 at 04:29


Quote: Originally posted by mayko  
These lovely blue mushrooms pop up around this time of year. Turns out, they also bruise a lovely green color!

Incidentally, does anyone have protips on preserving mushrooms? I tried putting this one in a closed container with some CaCl2 but it just got slimy and grungy...



it looks like it could be Lactarius indigo, https://en.wikipedia.org/wiki/Lactarius_indigo

Are you preserving to keep a specimen or to eat? sun dried or put in a food dehydrator will suffice if you're intending to eat them at a later date, I have no idea how you would preserve one as a specimen.





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[*] posted on 5-8-2016 at 05:30


Quote: Originally posted by NedsHead  
Quote: Originally posted by mayko  
These lovely blue mushrooms pop up around this time of year. Turns out, they also bruise a lovely green color!

Incidentally, does anyone have protips on preserving mushrooms? I tried putting this one in a closed container with some CaCl2 but it just got slimy and grungy...



it looks like it could be Lactarius indigo, https://en.wikipedia.org/wiki/Lactarius_indigo

Are you preserving to keep a specimen or to eat? sun dried or put in a food dehydrator will suffice if you're intending to eat them at a later date, I have no idea how you would preserve one as a specimen.


If you scroll up the page there's a photo where I squeezed the juice out of one onto a plate making a pretty color.
http://www.sciencemadness.org/talk/viewthread.php?tid=18256&...

[Edited on 5-8-2016 by Morgan]
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mayko
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[*] posted on 6-8-2016 at 17:23


That does look right, thanks for the ID and the nice pictures... edibility hadn't even crossed my mind!

I talked to the herbarium folks, apparently they usually make wax models rather than try to faithfully preserve specimens.




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[*] posted on 16-8-2016 at 21:26


My attempt at photographing potassium oxalate/chloride and green potassium ferrioxalate crystals:

image.jpeg - 404kB




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[*] posted on 25-8-2016 at 09:17


Gadolinium acetate crystals under a microscope with a polarizer.

<a title="By brainandforce (Own work) [CC0], via Wikimedia Commons" href="https://commons.wikimedia.org/wiki/File%3AGadolinium_acetate_under_microscope_polarizer.jpg"><img width="800" alt="Gadolinium acetate under microscope polarizer" src="https://upload.wikimedia.org/wikipedia/commons/thumb/f/f0/Gadolinium_acetate_under_microscope_polarizer.jpg/1024px-Gadolinium_acetate_under_micro scope_polarizer.jpg"/></a>




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[*] posted on 25-8-2016 at 10:24


@Brain&Force
This´s not pretty picture, this is beatiful picture :D.
Could you tell me approximately how big (or rather small :)) they are?
thanks.




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[*] posted on 25-8-2016 at 10:44


Quote: Originally posted by Velzee  
My attempt at photographing potassium oxalate/chloride and green potassium ferrioxalate crystals:

Nice crystals velzee.
Maybe you could try to take a photo with more contrasting background.
by the way, could you enlighten me what were you trying to make or why did u crystallised these mixture of compounds?
thanks in advance :).




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[*] posted on 25-8-2016 at 11:07


Quote: Originally posted by crystal grower  
Quote: Originally posted by Velzee  
My attempt at photographing potassium oxalate/chloride and green potassium ferrioxalate crystals:

Nice crystals velzee.
Maybe you could try to take a photo with more contrasting background.
by the way, could you enlighten me what were you trying to make or why did u crystallised these mixture of compounds?
thanks in advance :).


I'm sure the potassium oxalate was used to make the potassium ferrioxalate, and was not intentionally mixed with it.




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[*] posted on 25-8-2016 at 16:19


Quote: Originally posted by crystal grower  
Quote: Originally posted by Velzee  
My attempt at photographing potassium oxalate/chloride and green potassium ferrioxalate crystals:

Nice crystals velzee.
Maybe you could try to take a photo with more contrasting background.
by the way, could you enlighten me what were you trying to make or why did u crystallised these mixture of compounds?
thanks in advance :).


He's back! Welcome back!

Yes, as DraconicAcid said, I made an attempt at potassium ferrioxalate, but I forgot to account for the stoichometry when I replace KOH with K2CO3, thus excess contaminates remained.




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[*] posted on 25-8-2016 at 16:41


I got the same kind of result when I tried to make the malonate analogue. To get all the iron in solution, I had to use excess malonic acid, and then I couldn't get rid of the excess.



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[*] posted on 25-8-2016 at 17:46


Quote: Originally posted by DraconicAcid  
I got the same kind of result when I tried to make the malonate analogue. To get all the iron in solution, I had to use excess malonic acid, and then I couldn't get rid of the excess.


Do you still have the complex? If so, can you post photos?




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[*] posted on 25-8-2016 at 18:05


I have pictures if I can figure out how to post them.

[Edited on 26-8-2016 by DraconicAcid]

[Edited on 26-8-2016 by DraconicAcid]

xtals.jpg - 41kB

[Edited on 26-8-2016 by DraconicAcid]

xtals2.jpg - 110kB




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[*] posted on 25-8-2016 at 18:48


Wow, those are beautiful!



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[*] posted on 26-8-2016 at 07:07


Quote: Originally posted by DraconicAcid  
...

What are those? I need them :D
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[*] posted on 26-8-2016 at 08:25


Quote: Originally posted by Neme  

What are those? I need them :D

K3[Fe(mal)3], contaminated with K2mal or KHmal, where mal = malonate. They're not that great in person, as I used a decent magnification on the picture.




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