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Boffis
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[*] posted on 4-5-2013 at 17:25


Ferrocyanide when finely ground is almost colourless but ferricyanide and nitroprusside are darker yellow to yellow-orange depending on particle size.
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kristofvagyok
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[*] posted on 5-5-2013 at 04:57


Refining some palladium from 10% Pd/C with aqua regia:



-this color was always one of my favorites(:




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Adas
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[*] posted on 5-5-2013 at 07:52


Beautiful. Looks like... a strawberry juice :D



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S.C. Wack
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[*] posted on 5-5-2013 at 09:50


...so, so envious

...
Quote: Originally posted by chemcam  
does anyone have a test I could perform to be absolutely sure


Water. Solutions of the ferrocyanide are of course pure yellow.

One who gets ferricyanide for the ferrocyanide price should inquire about larger quantities.




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[*] posted on 5-5-2013 at 10:28


In water it becomes bright yellow. So then the label is correct and I am happy. Ferrocyanide is it.

Why do you suppose it is the exact color of the ferricyanide until I grind it up a bit? Do larger crystals appear darker due to light or something?




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garage chemist
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[*] posted on 5-5-2013 at 10:31


I have some crystalline ferrocyanide and it is pure yellow even with a crystal size of several millimeters.
The red ferricyanide gives a yellow solution in water! You definitely have ferricyanide, contact your supplier and complain!




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S.C. Wack
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[*] posted on 5-5-2013 at 11:22


Well, IMHO there is a apple-green note in mine...yes my statement was not correct...it's more that one is much darker and more electric...ferrocyanide is pale and plain.



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Endimion17
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[*] posted on 5-5-2013 at 11:50


How can you stand using such obsolete terminology? Ferrocyanide and ferricyanide... It was invented by the devil himself to make people angry. :D
Hexacyanoferrate(II) and hexacyanoferrate(III). Meaningful, informative and systematic.




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chemcam
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[*] posted on 5-5-2013 at 13:08


Quote: Originally posted by Endimion17  
How can you stand using such obsolete terminology? Ferrocyanide and ferricyanide... It was invented by the devil himself to make people angry. :D
Hexacyanoferrate(II) and hexacyanoferrate(III). Meaningful, informative and systematic.


On forums I try to use the most common terms so people understand what I am saying and don't have to decipher each word one by one. But anyway, so far I have gotten conflicting information about how to figure out what I have. I think what I will do is just bring back the bottle to my chem supply warehouse and ask them if they made a mistake.




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[*] posted on 6-5-2013 at 14:43




Taking a shot at isolating potassium via that strange reaction of Mg, KOH, and t-butanol.
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Oscilllator
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[*] posted on 9-5-2013 at 01:15


Quote: Originally posted by Sublimatus  


Taking a shot at isolating potassium via that strange reaction of Mg, KOH, and t-butanol.


Oh dear, I wouldn't use a 3-necked flask for that. Apparently the KOH corrodes the glass quite rapidly. Better to use an el-cheapo erlenmeyer or something




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[*] posted on 9-5-2013 at 05:47


I think just about everyone's experience has been the opposite, actually - little to no corrosion. I've done it 3 times myself now, and no visible effect on my glassware. I suppose there could be a tiny amount of etching, but if there is it's very slow.
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shocked.gif posted on 10-5-2013 at 13:10


Finally got a good picture of the etn needle-like crystals!!





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[*] posted on 14-5-2013 at 11:43


Some nice complexes I have recently made!
-Bis(dibenzoylmethane)Uranyl
1.JPG - 43kB
-Tris(acetylacetonate)Iron
2.JPG - 54kB
And some crystals of sodium sulfate!

3.JPG - 127kB

[Edited on 14-5-2013 by ItalianChemist]
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[*] posted on 16-5-2013 at 03:20


Is the Tris(acetylacetonate)Iron hygroscopic?
Looks nice, with a funny colour somewhere between brown and red.
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[*] posted on 16-5-2013 at 06:19


Some 4-aminobenzoic acid (PABA) which was recrystallized from vitamin supplement capsules. Absolutely amazing to watch them grow in solution, like massive cactus-like pods of crystals. Very easy to separate from the other ingredients in the capsules (magnesium stearate, stearic acid, silica). Also is a picture of the second batch of crystals that just started to form, sadly when I moved the beaker the layer of crystals floating on the surface fell down :(

image.jpg - 118kB image.jpg - 88kB

[Edited on 16-5-2013 by Mailinmypocket]
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[*] posted on 16-5-2013 at 10:15


A nice little crystal of bismuth, it measures ~30x30 mm2 :)

<img src="https://fbcdn-sphotos-h-a.akamaihd.net/hphotos-ak-snc6/217362_512463482136206_64663793_n.jpg" width="800" />

[Edited on 16-5-2013 by Hexavalent]

<!-- bfesser_edit_tag -->[<a href="u2u.php?action=send&username=bfesser">bfesser</a>: reduced image width]

[Edited on 7/7/13 by bfesser]




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[*] posted on 16-5-2013 at 22:36


Thought you guys might enjoy this picture.


It looks as if my watch glass has a big hole in it, but, it's actually crystals of hexamine forming. Photographed from the bottom side.




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[*] posted on 17-5-2013 at 05:05


K2SO4 crystals from NC synthesis
<img src="http://i.imgur.com/zGZ1xFP.jpg" width="800" />

Na2Cr2O7, i think this picture gets the red almost glowing flouroscent red this gives.. very deep and pretty
<img src="http://i.imgur.com/i7bC4cX.jpg" width="800" />

my favorite above all.. not only does it have incredibly many possibilities for one compound but its also pretty by itself
<img src="http://i.imgur.com/23SjeM3.jpg" width="800" />

another CuCl2 picture, from my mobile phone
<img src="http://i.imgur.com/ZV96Sez.jpg" width="800" />

sorry if the pictures fills 10 times this page :S

<!-- bfesser_edit_tag -->[<a href="u2u.php?action=send&username=bfesser">bfesser</a>: reduced image width]

[Edited on 7/7/13 by bfesser]




~25 drops = 1mL @dH2O viscocity - STP
Truth is ever growing - but without context theres barely any such.

https://en.wikipedia.org/wiki/Solubility_table
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[*] posted on 17-5-2013 at 06:55


AGH! Resize please!!!!11!!!!11!!!!1



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[*] posted on 17-5-2013 at 09:41


Quote: Originally posted by Bezaleel  
Is the Tris(acetylacetonate)Iron hygroscopic?

I don't think it's hygroscopic!
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[*] posted on 17-5-2013 at 19:19
Bromine Water






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[*] posted on 18-5-2013 at 13:37


Quote: Originally posted by Finnnicus  
AGH! Resize please!!!!11!!!!11!!!!1


i tried searching around, last times i tried whole SM literally crashed :S
didnt find much of use.. if you care to watch them hold ctrl and scroll back on mousewheel or press ''-''

is there any simple way to resize?




~25 drops = 1mL @dH2O viscocity - STP
Truth is ever growing - but without context theres barely any such.

https://en.wikipedia.org/wiki/Solubility_table
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kristofvagyok
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[*] posted on 18-5-2013 at 14:00




When you have no access to the NMR at the moment, but it's important to know that the nitration was successful or not.

As it could be seen, it was successful :D




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[*] posted on 18-5-2013 at 14:45


Quote: Originally posted by Antiswat  
Quote: Originally posted by Finnnicus  
AGH! Resize please!!!!11!!!!11!!!!1


i tried searching around, last times i tried whole SM literally crashed :S
didnt find much of use.. if you care to watch them hold ctrl and scroll back on mousewheel or press ''-''

is there any simple way to resize?

Open them in Paint, press ctrl+W, resize as you wish. Save the picture.




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