Sciencemadness Discussion Board
Not logged in [Login ]
Go To Bottom

Printable Version  
 Pages:  1  ..  55    57    59  ..  72
Author: Subject: Pretty Pictures (2)
mesanaw
Harmless
*




Posts: 10
Registered: 29-10-2016
Member Is Offline

Mood: No Mood

[*] posted on 18-6-2017 at 17:20


First is the silver mirror from Tollen's reagent made in an old-fashion Coke bottle.

EPA82JD.jpg - 776kB

Some Mohr's Salt I made.

8hkXN3q.jpg - 1.6MB

Copper Sulfate crystal still growing.

xEBh3iB.jpg - 625kB


View user's profile View All Posts By User
fluorescence
National Hazard
****




Posts: 285
Registered: 11-11-2013
Member Is Offline

Mood: So cold outside

[*] posted on 24-6-2017 at 23:01


The disatvantages to work with molten Potassium in test tubes :D

Kalium MoO3 265.jpg - 44kB




View user's profile View All Posts By User
ficolas
Hazard to Others
***




Posts: 146
Registered: 14-5-2016
Member Is Offline

Mood: No Mood

[*] posted on 26-6-2017 at 06:44


Quote: Originally posted by Neme  
One picture is bunch of copper(II) acetate crystals.

In next pictures is my attempt to double phantom crystal, chrome alum crystal in chrome alum+ KAl alum mixture in KAl alum. The inner black crystal is not visible tho so it's more like normal phantom crystal.



Did you do anything especial for the copper acetate crystals? I havent been able to crystalice it That way, un dark big crystals. All I get are lots of small lighter ones. The biggest dark ones I got were like 2-3mm big. Probably because impurities, or temperature changes? I wanted to try making it in a thermos, as I dont think I can get it much purer. I recrystaliced the acetate I have like 3 times in attempt to get crystals like those.

And since this is the pretty pictures topic, here is the result of my last attemp:

jgOPR0w.jpg - 719kB
This one has copper wires fragments inside, because in one of the attemps I has the biggest (3mm) crystals grow con a copper wire, so I tried adding some.

[Edited on 26-6-2017 by ficolas]
View user's profile View All Posts By User
Fulmen
International Hazard
*****




Posts: 1531
Registered: 24-9-2005
Member Is Offline

Mood: Bored

[*] posted on 26-6-2017 at 09:13
Salt pyramids


Got these after concentrating a batch of sodium dichromate:
I'm suspecting it's sodium chloride (from the bleach). Hard to tell from the photos by they are hollow, inverted pyramids.
IMG_0877#3.JPG - 158kB

Another pic taken at an angle:
IMG_0880#3.JPG - 144kB




We're not banging rocks together here. We know how to put a man back together.
View user's profile View All Posts By User
fluorescence
National Hazard
****




Posts: 285
Registered: 11-11-2013
Member Is Offline

Mood: So cold outside

[*] posted on 27-6-2017 at 23:56


Inverted pyramids? They look like octahedra on the photo.



View user's profile View All Posts By User
TheMrbunGee2
Harmless
*




Posts: 1
Registered: 16-6-2017
Member Is Offline

Mood: No Mood

[*] posted on 28-6-2017 at 05:50


Quote: Originally posted by ficolas  

Did you do anything especial for the copper acetate crystals? I havent been able to crystalice it That way, un dark big crystals. All I get are lots of small lighter ones. The biggest dark ones I got were like 2-3mm big. Probably because impurities, or temperature changes? I wanted to try making it in a thermos, as I dont think I can get it much purer. I recrystaliced the acetate I have like 3 times in attempt to get crystals like those.

[Edited on 26-6-2017 by ficolas]


You should dissolve your acetate in warm water, filter it and let it evaporate. Cooling hot solution may not give large crystals..
View user's profile View All Posts By User
Neme
Hazard to Self
**




Posts: 86
Registered: 28-5-2016
Location: Czech republic
Member Is Offline

Mood: No Mood

[*] posted on 30-6-2017 at 05:17


Quote: Originally posted by ficolas  
Quote: Originally posted by Neme  
...

...


Because of poor solubility of copper acetate in water, it takes very long to grow big crystal of it. The key is to let the saturated solution evaporate.

I made a bunch of saturated copper acetate solution by dissolving basic copper carbonate in acetic acid (BCC made from copper sulfate and sodium carbonate). I keep adding the solution to container with seed crystals and letting it slowly evaporate.
View user's profile View All Posts By User
Geocachmaster
Hazard to Others
***




Posts: 146
Registered: 5-3-2016
Location: Maine, USA
Member Is Offline

Mood: Corroded, just like my spatulas

[*] posted on 3-7-2017 at 12:56


Today I recrystallized around 100g of erythritol from water, and over the course of a few hours some large and rather beautiful crystals grew.

Also I left a flask with methanol and dissolved boric acid in it on the bench for a few days. Upon cooling down most of the acid deposited on the walls of the flask, but very slowly a thin layer of crystals formed, attached to the walls and suspended about 1 cm about the stir bar. The crystals in this layer are in a branched pattern and look very cool.

Pictures: https://youtu.be/zbwy-PT3DUY
(I couldn't figure out how to resize them, I'll have to work on that)




I make chemistry YouTube videos: https://www.youtube.com/c/tomslab
View user's profile View All Posts By User
mayko
International Hazard
*****




Posts: 1099
Registered: 17-1-2013
Location: Carrboro, NC
Member Is Offline

Mood: anomalous

[*] posted on 6-7-2017 at 17:25


Hot off the press, a never-before-published photograph of plutonium tetrafluoride! This was obtained by nuclear anthropologist Martin Pfeiffer via FOIA. It's a little disappointing (it is known as 'pink cake'; this is apparently misleading.) but upthread there are some very nice pictures of exotic things like plutonium trichloride
If you're on twitter and interested in nuclear history/technology/sociology, definitely check him out!

<blockquote class="twitter-tweet" data-lang="en"><p lang="en" dir="ltr">BEHOLD INTERNET!<br><br>My 2nd novel contribution to OSINT: my long sought pic of PuF4 &#39;pink cake.&#39; <br><br>FOIA&#39;d for your enlightenment! <a href="https://t.co/tnJqUhN5kc">pic.twitter.com/tnJqUhN5kc</a></p>&mdash; Martin Pfeiffer (@NuclearAnthro) <a href="https://twitter.com/NuclearAnthro/status/883128593953378308">July 7, 2017</a></blockquote>
<script async src="//platform.twitter.com/widgets.js" charset="utf-8"></script>



[Edited on 7-7-2017 by mayko]

[Edited on 7-7-2017 by mayko]




al-khemie is not a terrorist organization
"Chemicals, chemicals... I need chemicals!" - George Hayduke
"Wubbalubba dub-dub!" - Rick Sanchez
View user's profile Visit user's homepage View All Posts By User
fluorescence
National Hazard
****




Posts: 285
Registered: 11-11-2013
Member Is Offline

Mood: So cold outside

[*] posted on 8-7-2017 at 13:41


Selfmade Sodium Ferrate(VI) solution:



vlcsnap-2017-07-08-18h08m48s141.png - 645kB




View user's profile View All Posts By User
fluorescence
National Hazard
****




Posts: 285
Registered: 11-11-2013
Member Is Offline

Mood: So cold outside

[*] posted on 28-7-2017 at 05:20


I have no clue what this is to be honest.
I was trying to react some Iodine with FeCO5 and thought this was an Iodine-Ethanol solution. Turns out and judging by the blue color this was actually with an indicator, I guess starch? So this is the moment where the two chemicals meet but don't react as they are in different phases.

vlcsnap-2017-07-28-15h16m08s199.png - 850kB




View user's profile View All Posts By User
Texium
Administrator
********




Posts: 3615
Registered: 11-1-2014
Location: Salt Lake City
Member Is Online

Mood: Triturated

[*] posted on 28-7-2017 at 08:41


An intermediate product in the synthesis I'm doing at work currently, made via a Wittig reaction.

IMG_3666.JPG - 1010kB
Sure it's just a white solid, but I'm rather proud of the purity of it.




Come check out the Official Sciencemadness Wiki
They're not really active right now, but here's my YouTube channel and my blog.
View user's profile Visit user's homepage View All Posts By User
Loptr
International Hazard
*****




Posts: 1298
Registered: 20-5-2014
Location: USA
Member Is Offline

Mood: Grateful

[*] posted on 28-7-2017 at 08:56


Quote: Originally posted by zts16  
An intermediate product in the synthesis I'm doing at work currently, made via a Wittig reaction.


Sure it's just a white solid, but I'm rather proud of the purity of it.


That looks like a disilyl ether of methyl 3,4-dihydroxycinnamate? It's hard to see the backend of the bottle being visible as well.

What would the IUPAC name be for this compound? The TBS addition throws me off.

What is in store for this compound? What is the intended purpose of those silyl groups?

[Edited on 28-7-2017 by Loptr]




"Question everything generally thought to be obvious." - Dieter Rams
View user's profile View All Posts By User
Velzee
National Hazard
****




Posts: 379
Registered: 19-8-2015
Location: New York
Member Is Offline

Mood: Taking it easy

[*] posted on 28-7-2017 at 09:04


Lead picrate I made a week or so ago, as well as a demonstration of K3CrO8 with sulfur, and a few grams of black powder + magnesium I made for July 4th:







[Edited on 7/28/2017 by Velzee]




Check out the ScienceMadness Wiki: http://www.sciencemadness.org/smwiki/index.php/Main_Page

"All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident."
—Arthur Schopenhauer

"¡Vivá Cristo Rey!"
—Saint José Sánchez del Río
View user's profile View All Posts By User
Texium
Administrator
********




Posts: 3615
Registered: 11-1-2014
Location: Salt Lake City
Member Is Online

Mood: Triturated

[*] posted on 28-7-2017 at 09:40


Quote: Originally posted by Loptr  
Quote: Originally posted by zts16  
An intermediate product in the synthesis I'm doing at work currently, made via a Wittig reaction.


Sure it's just a white solid, but I'm rather proud of the purity of it.


That looks like a disilyl ether of methyl 3,4-dihydroxycinnamate? It's hard to see the backend of the bottle being visible as well.

What would the IUPAC name be for this compound? The TBS addition throws me off.

What is in store for this compound? What is the intended purpose of those silyl groups?
You're absolutely right. I think it would be something like methyl 3,4-bis(dimethyltert-butylsilyloxy)cinnamate, though I normally abbreviate it if I have to write it out. It's part of a series of reactions to make an anti-cancer drug, though I'm not sure if I can discuss the details publicly. The next reaction though will be reduction to the analogous cinnamyl alcohol using DIBAl-H. The silyl groups were added prior to the Wittig reaction and are just there as protecting groups. They will be removed at the end of the synthesis.

[Edited on 7-28-2017 by zts16]




Come check out the Official Sciencemadness Wiki
They're not really active right now, but here's my YouTube channel and my blog.
View user's profile Visit user's homepage View All Posts By User
The Volatile Chemist
International Hazard
*****




Posts: 1973
Registered: 22-3-2014
Location: 'Stil' in the lab...
Member Is Offline

Mood: Copious

[*] posted on 28-7-2017 at 16:14


It seems like pharma is the only way to go if you want to do synthetic organic chemistry, so I might have to go with a grad degree in pharmaceutical chemistry if I want to do that sort of stuff...looks fun though, zts16!



View user's profile Visit user's homepage View All Posts By User
Geocachmaster
Hazard to Others
***




Posts: 146
Registered: 5-3-2016
Location: Maine, USA
Member Is Offline

Mood: Corroded, just like my spatulas

[*] posted on 30-7-2017 at 17:45


Wet copper (II) chloride crystals, along with a small amount of excess HCl, giving rise to CuCl42- and the green color.

CuCl2.jpg - 869kB




I make chemistry YouTube videos: https://www.youtube.com/c/tomslab
View user's profile View All Posts By User
Morgan
International Hazard
*****




Posts: 1538
Registered: 28-12-2010
Member Is Offline

Mood: No Mood

[*] posted on 1-8-2017 at 12:30


Sodium bentonite clay that had some "continental drift" due to evaporation. Not a pretty picture but if you did it again in a larger pan and let it dry out, the image would be curious to see, with an artistic quality perhaps say if you had some separate in a long glass tube or something, the odd shapes it might make?
When it was saturated the thixotropic clay made a faint resonant sound when the bowl was tapped, or more apparent you could feel a ring to it.

DSC_0007 (1).JPG - 427kB

[Edited on 1-8-2017 by Morgan]
View user's profile View All Posts By User
agent_entropy
Hazard to Self
**




Posts: 91
Registered: 17-7-2006
Location: U.S.
Member Is Offline

Mood: No Mood

[*] posted on 3-8-2017 at 03:47


Do drawings count?

A friend asked how cannabis plants make cannabinoids. I may have gone a little far in drawing my answer...

cannabinoid total biosynthesis.png - 407kB
View user's profile View All Posts By User
agent_entropy
Hazard to Self
**




Posts: 91
Registered: 17-7-2006
Location: U.S.
Member Is Offline

Mood: No Mood

[*] posted on 3-8-2017 at 05:22
Tollen's Reagent


I kinda went wild with Tollen's reagent...
(I hope to sell these at the local flea market as art)

P1060259.JPG - 195kB P1060260.JPG - 123kB P1060266.JPG - 156kB P1060268.JPG - 117kB P1060269.JPG - 190kB P1060272.JPG - 192kB P1060275.JPG - 189kB P1060277.JPG - 283kB P1060281.JPG - 239kB P1060283.JPG - 254kB P1060284.JPG - 236kB P1060285.JPG - 148kB P1060286.JPG - 132kB P1060288.JPG - 219kB P1060290.JPG - 179kB P1060294.JPG - 244kB P1060295.JPG - 248kB P1060309.JPG - 359kB P1060319.JPG - 212kB P1060345.JPG - 225kB
View user's profile View All Posts By User
Neme
Hazard to Self
**




Posts: 86
Registered: 28-5-2016
Location: Czech republic
Member Is Offline

Mood: No Mood

[*] posted on 5-8-2017 at 02:46


These are amazing, what route and ratio did you use?
View user's profile View All Posts By User
Hegi
Hazard to Others
***




Posts: 199
Registered: 27-9-2013
Member Is Offline

Mood: No idea.

[*] posted on 5-8-2017 at 10:50


Quote: Originally posted by Supersonic  
Quote: Originally posted by Amos  
Copper(II) formate crystals. Their supernatant is the deepest of royal blues and yet the crystals are an icy-looking aqua color.


Large crystals have a nice form and beautiful color.
It`s a pity that they erodes even in warm air.

There crystals were synthesed from copper(II) hydroxide and formic acid.





Those are really beuatiful copper formate crystals. Especially, the second one is really big and it seems to be nicely shaped. What technique did you use to grow it? I tried once but there was a problem with hydrolysis mostly and even in acidic environment the salt did not want to crystallize easily. :)




Our webpage has been shut down forever cause nobody was willing to contribute. Shame on you all!!!
View user's profile View All Posts By User
Velzee
National Hazard
****




Posts: 379
Registered: 19-8-2015
Location: New York
Member Is Offline

Mood: Taking it easy

[*] posted on 14-8-2017 at 11:52


Ascorbic acid residue

IMG_7443.jpg - 195kB




Check out the ScienceMadness Wiki: http://www.sciencemadness.org/smwiki/index.php/Main_Page

"All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident."
—Arthur Schopenhauer

"¡Vivá Cristo Rey!"
—Saint José Sánchez del Río
View user's profile View All Posts By User
gluon47
Hazard to Self
**




Posts: 81
Registered: 20-9-2015
Location: oceania
Member Is Offline

Mood: fluorinated and dying

[*] posted on 9-9-2017 at 18:22




20170910_141556.jpg - 3.8MB 20170910_141450.jpg - 3.8MB

Nothing amazingly beautiful. Just some isopropyl propionate I made via Fischer esterification in my school's lab. 53% yield.




reality is an illusion :D
View user's profile Visit user's homepage View All Posts By User
LearnedAmateur
International Hazard
*****




Posts: 513
Registered: 30-3-2017
Location: Somewhere in the UK
Member Is Offline

Mood: Free Radical

[*] posted on 21-9-2017 at 07:10


Image 1: preparing copper hydroxide from impure copper sulphate solution, the black is copper oxide formed when the hydroxide is heated above 80C.
Image 2: dissolving the subsequent copper oxide in dilute sulphuric acid, reminds me of the sea floor. 'Scuse the leg.

The reason I did this was to purify the copper sulfate, producing it from the metal using H2SO4 and KNO3 creates water soluble byproducts which are removed by filtration.

H2SO4 + KNO3 -> KHSO4 + HNO3 {all aqueous}
Cu(s) + 4 HNO3(aq) -> Cu(NO3)2(aq) + 2 NO2(g) + 2 H2O(l)
Cu(NO3)2 + H2SO4 -> CuSO4 + 2 HNO3 {all aqueous}
Producing a solution containing CuSO4, KHSO4, and potentially residual KNO3

CuSO4(aq) + 2 NaOH(aq) -> Cu(OH)2(s) + Na2SO4
Cu(OH)2(s) + heat -> CuO(s) + H2O(l)
The alkali salts all remain in solution, and CuO is collected, readily reacting with acids unlike the base metal. The CuO can also be reduced to copper powder, useful if you start with a single piece like pipe and desire a large surface area.

IMG_0154.JPG - 699kB IMG_0165.JPG - 1.4MB




In chemistry, sometimes the solution is the problem.

It’s been a while, but I’m not dead! Updated 7/1/2020. Shout out to Aga, we got along well.
View user's profile View All Posts By User
 Pages:  1  ..  55    57    59  ..  72

  Go To Top