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Pretty Pictures (1)

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uzaymaymunu - 22-1-2013 at 10:13

My little birthday party

Burning mix: sugar rocket fuel, mg powder and KClO3

And Ferrofluid

<img src="https://fbcdn-sphotos-c-a.akamaihd.net/hphotos-ak-ash3/544806_10150706157984024_2108355769_n.jpg" width="800" />

[Edited on 22-1-2013 by uzaymaymunu]

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

[Edited on 7/7/13 by bfesser]

Mailinmypocket - 22-1-2013 at 10:26

Quote: Originally posted by uzaymaymunu

My little birthday party

Burning mix: sugar rocket fuel, mg powder and KClO3

And Ferrofluid

<img src="https://fbcdn-sphotos-c-a.akamaihd.net/hphotos-ak-ash3/544806_10150706157984024_2108355769_n.jpg" width="800" />

[Edited on 22-1-2013 by uzaymaymunu]

Wow! The awesome smell of burnt sugar must have permeated your house!

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

[Edited on 7/7/13 by bfesser]

Valentine - 24-1-2013 at 05:27

<img src="http://i48.tinypic.com/28s7ijc.jpg" alt="lucigenin" title="Lucigenin" />

Crystals of some freshly prepared lucigenin
(10,10'-Dimethyl-9,9'-biacridinium dinitrate)

Boffis - 24-1-2013 at 14:37

@ Valentine

Nice crop of crystals. Would you post details of your synthesis or at least a reference please?

Mailinmypocket - 26-1-2013 at 13:08

A molybdenum compound in formation

[Edited on 26-1-2013 by Mailinmypocket]

Morgan - 26-1-2013 at 19:23

There's a small plastic-coated disc magnet the spark skirts over to reach ground, thus the segmented spark. A 10 foot piece of gray pvc purchased for under 2 dollars was cut to a 6 foot length. A paper towel was sleeved over the tubing, charging the fruit. This evolved from first testing fruit as an electrode atop an empty metal jar.
http://www.youtube.com/watch?v=0HlovqIMGkM
http://www.youtube.com/watch?v=P-NbshIOJmc

[Edited on 27-1-2013 by Morgan]

Valentine - 27-1-2013 at 03:38

Quote: Originally posted by Boffis

Nice crop of crystals. Would you post details of your synthesis or at least a reference please?

Started with anthranilic acid,
1. diazotized then decomposed via Sandmeyer reaction to get o-chlorobenzoic acid (general procedure)
2. Ullmann reaction between aniline and o-chlorobenzoic acid (Organic Syntheses, Coll. Vol. 2, p.15, 1943)
3. Intramolecular condensation of N-phenylanthranilic acid to acridone (Organic Syntheses, Coll. Vol. 2, p.15, 1943)
4. Methylation of acridone with methyl iodide to get N-methylacridone (general procedure)
5. Reductive coupling of N-methylacridone with zinc to get N,N'-dimethyl-9,9'-biacridine
6. Dissolving N,N'-dimethyl-9,9'-biacridine in hot dilute nitric acid, lucigenin crystallizing out on cooling

plastics - 27-1-2013 at 07:51

Synthesis, including intermediates:

http://www.youtube.com/user/chemx01/videos?view=0

Very good youtube site, highly recommended

Quote: Originally posted by Valentine

Quote: Originally posted by Boffis

Nice crop of crystals. Would you post details of your synthesis or at least a reference please?

Boffis - 28-1-2013 at 18:36

@ Valentine

Thanks for the outline for lucigenin.

I actually did a search online line and found this:

Attachment: Lucigenin preperation JACS 1982.pdf (1.3MB)
This file has been downloaded 819 times

Xenon1898 - 2-2-2013 at 00:51

Quote: Originally posted by Valentine

<img src="http://i48.tinypic.com/28s7ijc.jpg" alt="lucigenin" title="Lucigenin" />

Crystals of some freshly prepared lucigenin
(10,10'-Dimethyl-9,9'-biacridinium dinitrate)

Nice The name of the chemical alone is worth the post! But I love the yellow hue too.

kristofvagyok - 2-2-2013 at 16:35

Have any of you made isocyanides? I just made some and I would say 3 things: it has a really bad odor, it causes a really massive headache what won't cease from anything and it goes through latex gloves.
-in your body isocyanides isomerize to cyanides, so be smart when working with these

-they are highly UV active and my compound had a really nice color as seen above. Click on the pics and see my other pictures(:

mr.crow - 4-2-2013 at 12:40

Wow! Who would have though something so unpleasant would be so pretty.

UnintentionalChaos - 4-2-2013 at 17:56

Quote: Originally posted by kristofvagyok

-in your body isocyanides isomerize to cyanides, so be smart when working with these

I kinda have my doubts about that (not that nitriles are particularly hazardous in many cases). I would expect hydration to N-alkyl-formamides to be their primary fate.

[Edited on 2-5-13 by UnintentionalChaos]

Valentine - 5-2-2013 at 08:52

Playing with some lucigenin

Boffis - 5-2-2013 at 09:05

@Valentine

I like than!

kristofvagyok - 5-2-2013 at 13:47

Valentine, this pics with lucigenin is simply amazing.
I have just found a few g of it in the lab, I'm going to try out something with it tomorrow(:

BromicAcid - 5-2-2013 at 15:06

Quote: Originally posted by kristofvagyok

Have any of you made isocyanides?

Methyl, butyl, pentyl, methylisocyanoacetate, ethylisocyanoacetate, and 2-napthylisocyanide. They're the types of chemicals where you make the person running them wear a saranex suit when they come out of the lab to keep the stink inside.

Mailinmypocket - 6-2-2013 at 09:47

75g of lead acetate- prepared with lead powder, 80% acetic acid and 35% H2O2 in a reflux setup. It only took about half an hour for the 47.5g of lead to dissolve completely and it was very exothermic. Now... Time to make a coffee and sweeten it

elementcollector1 - 6-2-2013 at 10:03

It looks so beautiful... and yet must be so deadly.

Adas - 6-2-2013 at 10:16

Quote: Originally posted by Mailinmypocket

75g of lead acetate- prepared with lead powder, 80% acetic acid and 35% H2O2 in a reflux setup. It only took about half an hour for the 47.5g of lead to dissolve completely and it was very exothermic. Now... Time to make a coffee and sweeten it

Those crystals are AMAZING

a few weeks ago, I had a dream that I couldn't resist eating some Pb(OAc)2

Mailinmypocket - 6-2-2013 at 11:07

The key to making the crystals was extremely slow cooling. I put the hot syrupy liquid into an insulated thermos lunchbox, wrapped a towel around the beaker and sealed up the lunchbox. Even 5 hours later the beaker was still warm but no crystals, only the next morning I found the mass crystallized, yay!

Boffis - 6-2-2013 at 19:21

The barium salts or complexes of alloxan 5 oxime grown under the microscope. Why you sometimes get two distinct compounds forming is not clear they are both Ba oximates.

mayko - 7-2-2013 at 08:33

A copper sulfate crystal that grew in one of my beakers. To the right, copper sulfate is combined with ammonium sulfate (white, far right) to form the ionic salt Cu(NH4)2(SO4)2 , a nice robin's egg blue. This is an example of a Tutton salt, with the general formula [M(II)][M(I)]2(SO4)2, where M are cations.

To the left, copper sulfate has been complexed with ammonia (far right). The ammonia ligands interact with the copper's d orbitals, causing the color to change to a deep indigo.

I think it's a neat illustration of the ionic compound being a 'dilution' of color whereas the covalent bonding alters the color.

copper ammonia sulfate_small.png - 384kB

DJF90 - 8-2-2013 at 13:04

@ boffis: The two forms will be polymorphs

Are many people using microscopes?

Xenon1898 - 9-2-2013 at 23:22

Quote: Originally posted by mayko

A copper sulfate crystal that grew in one of my beakers. To the right, copper sulfate is combined with ammonium sulfate (white, far right) to form the ionic salt Cu(NH4)2(SO4)2 , a nice robin's egg blue. This is an example of a Tutton salt, with the general formula [M(II)][M(I)]2(SO4)2, where M are cations.

To the left, copper sulfate has been complexed with ammonia (far right). The ammonia ligands interact with the copper's d orbitals, causing the color to change to a deep indigo.

I think it's a neat illustration of the ionic compound being a 'dilution' of color whereas the covalent bonding alters the color.

Good use of a microscope in the lab. I am wondering, do many people find microscopes useful in the home lab? This seems like a great example of a good use (two pure crystals forming as the same time). Seems like it would be a reasonable investment as an analytic qualitative tool to identify crystal structure(?)

Boffis - 10-2-2013 at 15:18

@DJF96

I’m not sure that they are polymorphs, for various reasons I think their formation is pH or perhaps temperature dependent. The former is based on the differing reactions between acetates and chlorides of the same metal; violuric acid is a weak acid (pK 4.70) but slightly stronger than acetic acid (pK 4.76) but much weaker than hydrochloric acid. I intend to investigate this with various organic buffers (to avoid adding ammonia or alkali metals since they react too) and ion exchange resins.

When I did the initial work many years ago I started in an unheat lab in winter at about 8 C, subsequent work was all done at normal room temperature. A third facture may be purity of reagent, which I am currently investigating, because I made the early batches in small quantities and each time used a different method. A possible side product is 5-nitrobarbituric acid which forms sparingly soluble salts but I have no data on their colours.

Violuric acid forms both salts and chelates; alkalis and alkaline earths + some organic bases form salts of the nitroso tautomer while Fe and Co form extremely soluble chelates (Fe intense deep blue and Co deep orange) (eg Leermakers & Hoffman JACS 1958 p5663). Most of the post 1800 work deals with the chelates and almost nothing appears in relation to the salts. Mn2+, Zn2+, Cd2+ and UO22+ all resemble alkaline earth metals in the way they react. Cu2+ appears to form a sparingly soluble olive green chelate.

So there are lots of possibilities and I could write a book on this fascinating compound and is numerous close relatives! When I get more time in the lab I’ll investigate further and report.

kristofvagyok - 10-2-2013 at 23:58

Working with trinitrobenzene-Li salt what has a strong fluorescence under UV:

And my gloves after I have made Nurd Rage's blue smash glow crystals in a flask that accidentally cracked in my hands:

Zan Divine - 11-2-2013 at 13:32

I've posted some K & Na ampoules before. The ones I'm making for my present client are bigger. The below is sodium (ca. 1/2 lb.), for comparison is 15 lb. Marvin.

Attachment: phpIruPfF (62kB)
This file has been downloaded 1195 times Attachment: phplTxDXQ (90kB)
This file has been downloaded 1156 times

[Edited on 2/11/2013 by Zan Divine]

Pyro - 12-2-2013 at 14:28

holy crap! that's amazing!!

elementcollector1 - 12-2-2013 at 14:38

How do you DO that?!

bfesser - 13-2-2013 at 09:21

Quote: Originally posted by Mailinmypocket

A molybdenum compound in formation
[Edited on 26-1-2013 by Mailinmypocket]

I have a special place in my heart for molybdenum … right after copper. Could you please post some details on this in another thread? Or if I just plain missed it, could you please PM me with the TID?

Zan Divine - 13-2-2013 at 10:33

Quote: Originally posted by elementcollector1

How do you DO that?!

Conceptually, it's actually easier than the method I described for the 3/4 " tubes last summer. The glass is 1.5" in diameter and is really more than a single flame torch (what I have) can handle easily.

Consequently, my constricted areas are very short and tricky to seal.

The method is simple, devil is in the details. Long glass tube, seal one end, make a constriction where you want the ampoule to end. Add coarse SS wool ball above constriction and balls of OIL FREE metal above that. Attach vacuum pump. Tilt tube at 45 degrees, wrap with heating tape. Melt metal. It flows into the ampoule which is then torch sealed.

Any oil you miss makes the tube cloudy. Molten metal continuously flowing over constriction tries to wet it making sealing doubly tricky.

[Edited on 2/13/2013 by Zan Divine]

Mailinmypocket - 13-2-2013 at 11:03

Quote: Originally posted by bfesser

Quote: Originally posted by Mailinmypocket

A molybdenum compound in formation
[Edited on 26-1-2013 by Mailinmypocket]

Sure! Ill just post it here. I meant to show the final product but I forgot, so I dug it out just now and mixed a bit into water to display the color. The compound is molybdenum blue, a hydroxide of molybdenum, Mo4O10(OH)2. It's a dark royal blue powder. The preparation was followed almost as per Brauer, except I mixed the MoO3 powder into the dilute HCl very well, and then added the Zn granules:

"MOLYBDENUM BLUE, Mo4O10(OH)2
Obtained by reaction of nascent hydrogen with MoO3.
Fifty ml. of distilled water and 10 ml. of cone. HCl, followed
by 3 g. of analytically pure zinc granules, are added to 10 g. of
MoO3. The mixture is left standing overnight; the blue precipitate is then filtered off, washed until no chloride reaction is evident, and dried over P3O5.

Alternate methods: a) Reduction with SnCl3 • 2 H3O in HC1
solution.
b) Synthesis from MoO3 and Mo powder (O. Glemser and G.
Lutz, see below).

PROPERTIES:
Formula weight 477.82. Blue crystalline powder. In air,
oxidizes very slowly to MoO3. Stable to NH3 and alkalies. Good
electrical conductivity.

REFERENCE:
O. Glemser and G. Lutz. Z. anorg. allg. Chem. 264, 17 (1951)."

[Edited on 13-2-2013 by Mailinmypocket]

mayko - 18-2-2013 at 17:38

Quote: Originally posted by Xenon1898

That one wasn't actually taken under the scope, but I do have a USB microscope. I don't currently know enough about crystals to do much identification, but I am sure that in the right hands it would be a powerful tool. Thusfar, I've mostly been getting up close and personal with dead bugs, my warts/moles/hangnails, etc. Here's some of the crystal shots I took thought.

Copper acetate feathers

Closer view of copper acetate

Surface of a copper sulfate crystal

Thermite leftovers

Epsom salt

I'm really glad I got it - next I'm gonna get some polarizing filters and do some video of vitamin C

edit: bugs etc can be found here

[Edited on 19-2-2013 by mayko]

MrHomeScientist - 20-2-2013 at 15:00

A tiny amount of Elephant Toothpaste that I had leftover after a large scale demo. Rather than washing it down the drain, I mixed the few drops of each solution that was left over and it foamed up mightily

There's a bit of starch added in to color the foam blue.

kristofvagyok - 21-2-2013 at 14:46

Long ago someone mentioned that how bad could be when something is overreacting... Someone in our lab had a large scale nitration (3 mol aromatic aldehyde and a lot nitric and sulfuric acid) what was accidentally left over.... Do not try to reproduce it.

AndersHoveland - 23-2-2013 at 02:50

Crystals of copper(II) acetate:

Pyro - 23-2-2013 at 04:54

how do you make them grow like that? that's really cool!

Mixell - 23-2-2013 at 09:20

That photo is taken from Wikipedia.

kristofvagyok - 23-2-2013 at 14:22

Finally a successful nitration. This time bit more than 400g of 4MeO-acetophenone was nitrated

Microwave Powered Steam Distillation

Organikum - 24-2-2013 at 09:28

Out of the endwise vertical microwave comes a 29/32 to some addition thingie, to a splashhead and away through a 40cm high performance condensor to the far far away collecting flask.
800 nominal Watt of MW power, when heated up it steams 4-500ml in 20 minutes on 80%, cleaner and faster then a steamgenerator.

And it looks beautiful as I recognized when sorting the pics today

/ORG

[Edited on 24-2-2013 by Organikum]

Organikum - 26-2-2013 at 21:49

Thats now only indirectly chemistry related but I think it is cute so I hope I will be forgiven.

And its a riddle: What is it?

froot - 26-2-2013 at 23:27

It's a geared motor with a low rpm output shaft. Peristaltic pump?

mayko - 27-2-2013 at 11:12

Copper ammonium oxalate. The crystals were so tiny that they had to be microphotographed, but I was quite pleased with them.

Endimion17 - 2-3-2013 at 05:53

Guys, there's more and more great photos here, well done.

Anders, how big are those awesome crystals? 5 mm?

Here's a really overexposed photo of you know what.

(It was taken during the time I was purifying the accumulated batches. I don't work with it anymore. Thanks to my friend for letting me use his camera.)

<img src="http://i135.photobucket.com/albums/q136/endimion17/pokusi/cuttingpurewhitephosphorusindark.png" width="800" />

I think it was a half minute exposure, perhaps more. I was really afraid I was "tickling the dragon's tail" as it looked as it was few seconds short of bursting into flames, but had to be very still with the knife and the tweezers.

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

[Edited on 7/7/13 by bfesser]

Pok - 3-3-2013 at 09:04

Quote: Originally posted by Endimion17

Here's a really overexposed photo of you know what.

That's really amazing! It seems to glow like a light bulb.

Here are some of my copper compounds: acetate and sulfate.

It now weights about 500 grams and that's enough.

Some copper acetate crystals

The largest one...

...and a smaller one.

All of them were grown from only metallic copper, acid and air. The formation of these two salts from these 3 reagents took 1-2 years and the growth of the crystals took 3-5 years.

kavu - 3-3-2013 at 09:11

Quote: Originally posted by Organikum

And its a riddle: What is it?

That would be the turntable synchronous motor for microwave ovens.

Mailinmypocket - 3-3-2013 at 09:47

Pok! Amazing copper crystals!!

On the subject of crystal growing, has anyone tried growing crystals in gel? Came across this page last week...

http://chemmovies.unl.edu/chemistry/smallscale/SS072.html

[Edited on 3-3-2013 by Mailinmypocket]

Eddygp - 3-3-2013 at 11:55

Quote: Originally posted by Mailinmypocket

kavu! Amazing copper crystals!!

On the subject of crystal growing, has anyone tried growing crystals in gel? Came across this page last week...

http://chemmovies.unl.edu/chemistry/smallscale/SS072.html

Hmmm, interesting... I haven't tried it myself, but I have crystallized CuSO4 with a low temperature procedure.
I wonder how many incredible Ru crystals would form if you melted ruthenium and kept the temperature just below its melting point, decreasing it each day very little, letting it crystallize very slowly, forming enormous metallic crystals!

Endimion17 - 3-3-2013 at 12:57

Pok, those are spectacular. I think you could make some serious money if you sell them.

neptunium - 3-3-2013 at 13:22

i know this is not chemistry but i think its pretty too...and its still science!
made an xray machine...this is my hand...

handX2 - Copy.bmp - 108kB

a smoke detector...

smokedetectorX.bmp - 108kB

and a playstation2 controller..

ps2cotrollerX.bmp - 108kB

kristofvagyok - 3-3-2013 at 14:01

We have just made some metallic silver from scrap, approx. 250g with a ~99,99% purity.

It was melted in a ceramic crucible with an oxygene/methane torch, under circa 1h. The silver was liquified under a layer of borax (it prevents the oxidation of the molten silver). After all have melted we just dropped it in a bucket of water and took out this shiny lump of this beautiful metal.

[url=http://labphoto.tumblr.com]

[/url]

neptunium - 3-3-2013 at 17:47

nice! solid chunk of Ag!

mr.crow - 3-3-2013 at 20:53

Are those stray pixels from x-rays hitting your camera sensor? Yikes

I can't imagine what it was like for Rontgen to expose the first x-ray picture and see the bones showing.

neptunium - 4-3-2013 at 05:24

the camera was protected somewhat from too much radiations, and was aimed at a mirro reflecting the fluorescent screen ....
but yes those pixels are being fried you can tell the protective screen was not high enough in the last picture!

Iodine crystals

m1tanker78 - 5-3-2013 at 19:55

Yet another one of my forgotten experiments sitting on my work bench. I was going to throw the plastic bottle containing the solution in the trash until I saw some iodine crystals forming on the sides of the bottle. I plucked one out and did my best taking some macro shots with my cell phone camera. I also photographed a couple more right through the plastic bottle.

That last one looks wicked - like something I'd put at the end of a spear. I hope to be able to store the crystals once harvested.

Tank

Mailinmypocket - 6-3-2013 at 15:03

Not mind-blowingly pretty pictures, I thought they looked nice though

1: Copper turnings reacting with acidified thiourea solution (see "low pH oxidation of thiourea" thread for details.
2: Nitration of thymol in a hot (80c) water bath.

Eddygp - 7-3-2013 at 12:54

Nitrating thymol... sounds amazing! Could you PM me with the procedure?

Mailinmypocket - 7-3-2013 at 14:49

Quote: Originally posted by Eddygp

Nitrating thymol... sounds amazing! Could you PM me with the procedure?

For sure! I followed the procedure from "Systematic Lab Experiments in Organic Chemistry" by Arun Sethi. The process is to dissolve 200mg thymol in 2ml 98% H2SO4. Once this is done add 4 ml of a nitrating mixture composed of 2ml conc HNO3 and 2ml conc H2SO4. Heat on a hot water bath for 15 minutes, filter, wash with cold distilled water, and recrystallize from dilute HCl if desired. I obtained about 215mg of the crude product.

Link to the book in question: http://books.google.ca/books/about/Systematic_Laboratory_Exp...

[Edited on 8-3-2013 by Mailinmypocket]

Morgan - 9-3-2013 at 18:59

I saw this post the other day on Reddit.
http://imgur.com/sIDB73G
http://www.reddit.com/r/pics/comments/19voto/this_rock_crack...

[Edited on 10-3-2013 by Morgan]

AndersHoveland - 9-3-2013 at 19:51

Quote: Originally posted by Morgan

I saw this post the other day on Reddit.
http://imgur.com/sIDB73G

What type of mineral could that be??

Morgan - 9-3-2013 at 20:34

I found a rock that kind of has the same strange melted look to it. It's not like a typical quartz or obsidian where the surface is glassy smooth, but rather plastic looking almost with little bits of color if you turn it this way and that. It's a strange texture like that rock. It's kind of hard to see in these photos but maybe you can make it out. Perhaps metal oxide interference is making the hints of color in my rock, very faint glints and flecks, some inside the fissures.

$Color in fracture.JPG - 78kB$

Sublimatus - 9-3-2013 at 20:47

Maybe apatite (a calcium phosphate mineral)? Where did you find it?

AndersHoveland - 9-3-2013 at 20:55

Quote: Originally posted by Morgan

I found a rock that kind of has the same strange melted look to it. It's not like a typical quartz

I found just such a rock at a construction site when I was a child too. It looked almost like a broken piece of glass, but the crystal cleaved along a horizonal plane.

[Edited on 10-3-2013 by AndersHoveland]

Endimion17 - 10-3-2013 at 05:56

Morgan, it looks like a piece of shattered tempered glass subjected to atmosphere for quite a long time. Hence the iridescence.
At first, when I saw the thumbnails, I thought it might fluorite, but upon closer look, it does look too glassy.

Morgan - 10-3-2013 at 06:48

I was thinking the waxy look of the surface is as if a piece of glass or quartz was flash heated to smoothen the surface. The glossy luster isn't like the flat face of a crystal, but having slight ripples in places too.
It might something like this and because it's clear, I didn't recognize how obsidian kind of has those ripples in places. A few months ago I decided to crack apart a large rock of black obsidian to see what kind of cutting tool would come about. A nice 10cm edge broke off that was very sharp. The thinness of the glass where it was sharp was a lighter smokey color instead of a black opacity in bulk.
http://en.wikipedia.org/wiki/File:Conch_fract_glass.jpg
http://en.wikipedia.org/wiki/Conchoidal_fracture

"Several researchers have used scanning electron microscopy to determine the effect of heat treatment on cherts, a variety of microcrystalline quartz."
"They found that heat-treated cherts fracture to form much smoother surfaces. In unheated cherts, a fracture goes around the grains and microcrystals, leaving a rough surface. In heated cherts, the fracture goes through the microcrystals themselves, which results in a much smoother surface. This smoother surface reflects light more evenly and produces an increased surface luster or "greasy" texture that is quite visible and serves as an indication of heat treatment."
http://donsmaps.com/heatflint.html
http://donsmaps.com/images3/conchoidal.jpg

[Edited on 10-3-2013 by Morgan]

Magpie - 11-3-2013 at 12:18

Needing 10g of NH4Cl I titrated 10% NH4OH with ~6M HCl to a methyl red endpoint (pH = 4). I then placed the solution in my family room window sill. After a couple days crystals are now forming:

woelen - 11-3-2013 at 12:57

I have a 10...15 kV DC generator. This is the device:

When it is switched on, then the little wire at the left of the device shows a purple glow and makes a soft hissing noise. You also can feel a wind coming from this wire. It is a corona discharge:

corona-closeup-long-exposure-2.jpg - 43kB

This is quite spectacular. There is only one end, the current simply flows through the air! The other end is at the other wire, shown in the picture of the device.

I intend to use this device for high voltage experiments with gas discharge tubes.

[Edited on 11-3-13 by woelen]

hissingnoise - 11-3-2013 at 13:13

Quote:

. . . makes a soft hissing noise.

"Soft" is a four-letter word, woelen . . .

hissingnoise - 11-3-2013 at 13:24

. . . and you're playing with (St. Elmo's) fire!
The small amounts of ozone produced are good for air-cleaning a smoky room, and such.

Adas - 11-3-2013 at 13:29

Is that really a DC generator? I've heard that only AC produces this one-wire-glow. I might be wrong.

mr.crow - 11-3-2013 at 19:14

Quote: Originally posted by Magpie

Needing 10g of NH4Cl I titrated 10% NH4OH with ~6M HCl to a methyl red endpoint (pH = 4). I then placed the solution in my family room window sill. After a couple days crystals are now forming:

Ammonium chloride makes such nice snowflake crystals. I filmed a video of a saturated solution cooling, looked like a blizzard in a flask

neptunium - 12-3-2013 at 06:17

Quote: Originally posted by Adas

Is that really a DC generator? I've heard that only AC produces this one-wire-glow. I might be wrong.

indeed you are! 10-15Kv AC is fun but will not generate the wind of charged particles mentioned above. only DC can do that.
I have a 40Kv for the Xray machine and a 100Kv for other stuff...
if you like to play with vacuum tubes and high voltage you should totally get you a Cockrof Watson ladder!
10-15 Kv is the lowest you can do anything with you've got to get more volts!!

bfesser - 19-3-2013 at 13:28

A mind-blowing photograph of the eruptions of <a href="http://en.wikipedia.org/wiki/Sakurajima" target="_blank">Sakurajima Volcano, Japan</a> <img src="../scipics/_wiki.png" />, February 2013, taken by <a href="http://www.mrietze.com/web13/japan13.htm" target="_blank">Martin Rietze</a> <img src="../scipics/_ext.png" />:
<img src="http://www.mrietze.com/images/japan13/Jp13-084-5DIIdet.jpg" />

<iframe sandbox width="560" height="315" src="http://www.youtube.com/embed/XTns__G_F1U" frameborder="0" allowfullscreen></iframe>
(Note; the audio is re-synced to match the visual.)

[Edited on 7/9/13 by bfesser]

platedish29 - 20-3-2013 at 12:59

Brassy, gold rain. More of a "golden rain" because in fact there is no gold in there.

Ever heard of those drinks with parcicles of gold inside which worth a fortune? Now you can have it!Or tell your friends you do (at least).
(ammonium)? ferrous phosphate suspension.
(looks nasty, I've put too much a dosage)
Thanks rstar from whom the idea has been stolen!

[Edited on 20-3-2013 by platedish29]

Pyro - 22-3-2013 at 09:22

I believe that the ''gold'' in drinks is real gold, but just tiny bits of gold leaf so it's worth practically nothing. You could put it in drinks to sell, but just to people who you don't like...

kristofvagyok - 22-3-2013 at 09:31

So, we have just opened two methyl-mercaptan cylinder. It was precooled with an ice-salt bath and we've just simply got of it's head (on the third pics).

You could not imagine what odor it had... On room temperature the 225g of MeSH is a bit more than 100liters of gas.

DO NOT TRY THIS AT HOME

Adas - 22-3-2013 at 11:53

Quote: Originally posted by kristofvagyok

So, we have just opened two methyl-mercaptan cylinder. It was precooled with an ice-salt bath and we've just simply got of it's head (on the third pics).

You could not imagine what odor it had... On room temperature the 225g of MeSH is a bit more than 100liters of gas.

DO NOT TRY THIS AT HOME

Very nice. The bottle seems old and rusty though. Good that you used it before it leaked

mr.crow - 22-3-2013 at 12:40

Wow! Looks just like water

What could you possibly need liquid MeSH for? Must have smelled like a mega asparagus fart, fire department getting called, etc

Pyro - 23-3-2013 at 12:57

little crystals of AgNO3 after sitting in the dessicator for a month, most of it is still not dry!
but this looks just like coral

CaptainOfSmug - 26-3-2013 at 10:40

Hey all, I'm guessing this would be the thread to ask this question. I'm looking for some compounds/ crystals to display in my apartment. Obviously they should have to be non toxic and have a "shelf"

. If they could be placed under a UV lamp that would also be a plus. I'm open to any ideas and would hopefully be able to fairly easily prepare them. Thanks for any ideas!

bfesser - 26-3-2013 at 13:11

Wrong place to ask your question. Regardless, they're called mineral specimens. Try eBay.

CaptainOfSmug - 26-3-2013 at 14:44

Well I don't want to just buy a mineral... if I wanted to do that I wouldn't need to ask haha, I'm more interested in growing something on my own that has a shelf life and is non toxic and preferably not out of some crystal growing kit

elementcollector1 - 26-3-2013 at 15:02

Chrome alum?

Pyro - 28-3-2013 at 14:11

CuSO4, normal alum, NaCl, I found Sr(NO3(2 makes nice crystals, especially with impurities you can get an impure crystal inside a pure one, looks really cool

kristofvagyok - 4-4-2013 at 16:17

Since this topic looks like it's dead... Here is a picture from an elecrochemical reaction what we've made, or we could say that we've tried....

In the cell there was a tungstern cathode (that spiral at the bottom) and a platinum anode (the net in the center). The result was a black gunk.

Pyro - 5-4-2013 at 05:54

Kristof, you really keep this post alive!

That is a nice container with the built in cooling! what exactly were you electrolizing?

chemcam - 5-4-2013 at 16:25

This is the most Beautiful Reaction I have seen so far in my history experimenting with chemistry. I was going to post only a picture but the video from my YouTube channel is just amazing. It reminds me of a view of earth from space. Be sure to adjust the video player setting to 720p so you get the full HD experience.

Please let me know what you think and thank you to the people who commented and subscribed.

[Edited on 6-4-2013 by chemcam]

Morgan - 5-4-2013 at 21:29

A 30 liter keg with a snorkel and some methanol inside - a simple demonstration using a water bath for cooling.
http://www.youtube.com/watch?v=_DV4qdmWblc&nofeather=Tru...

bahamuth - 5-4-2013 at 21:40

Quote: Originally posted by chemcam

This is the most Beautiful Reaction I have seen so far in my history experimenting with chemistry. I was going to post only a picture but the video from my YouTube channel is just amazing. It reminds me of a view of earth from space. Be sure to adjust the video player setting to 720p so you get the full HD experience.

Please let me know what you think and thank you to the people who commented and subscribed.

[Edited on 6-4-2013 by chemcam]

Well, not to down it but I've seen that movement several times in alcohol/water/lipid solutions, but the blue contrast with the white really makes it a masterpiece in my eyes. Also since it is a vid I really love it

MrHomeScientist - 8-4-2013 at 05:41

Quote: Originally posted by chemcam

So that effect was happening at room temperature? That's neat that you'd see that conevection-like movement without any heating.

Finnnicus - 8-4-2013 at 06:18

Ahhhhhhh! Fanboy time. I love lab photo! Following it for ages before I got an account here. Look it's mr homescientist repling to chemcam...

Oh on another note,

Quote:

Obviously they should have to be non toxic and have a "shelf". If they could be placed under a UV lamp that would also be a plus. I'm open to any ideas and would hopefully be able to fairly easily prepare them.

Well I got a pretty one, but it's carcinogenic...

keep it in a Perspex box? http://www.sciencemadness.org/talk/viewthread.php?tid=23905 (I liked it too)

chemcam - 8-4-2013 at 09:54

Quote: Originally posted by MrHomeScientist

So that effect was happening at room temperature? That's neat that you'd see that conevection-like movement without any heating.

Yes, room temperature. It was 72F in my house on my desk. There was definitely no additional heating but the motion was activated by the vibrations of me walking up to it. You can tell near the end of the video that it is becoming weaker and weaker, because I am standing still.

Finnnicus, I don't understand what you're trying to say, are you asking for a beautiful crystal that is non-toxic?

[Edited on 8-4-2013 by chemcam]

Moment of Detonation

chemcam - 9-4-2013 at 12:56

Here is a picture of mercury fulminate, right as it explodes.

Pyro - 9-4-2013 at 14:10

not really chemistry, but i found this insect collection that i bought at a yard sale a few yrs ago for 5 eur. somebody had borrowed them and apparently neglected them as there is a little mold.

violet sin - 9-4-2013 at 16:31

not totally chemistry related, but it is used as a catalyst support. I found some native asbestos last sunday while marching our cattle up the mountain.

this is my attempt at showing it catch the sun. as I stepped over it on the mountain it lit up like white fire! the sun was higher in the sky then and showed more than this shot.

asbestos 1.bmp - 532kB

this is a shot of indirect light inside. kinda just honey colored with darker blueish spots and grey specks.

0409131558.bmp - 832kB

at first I thought I had found a band of "tigers eye" but after looking closer it rubs off REALLY easy to furry little bits...

asbestos 3.bmp - 729kB

my uncle confirmed he knew of several places that it is in rock faces there. I am hoping to go back and find some larger veins. not that I want to mess up my lungs by breaking it up, just for my rock collection.

Endimion17 - 12-4-2013 at 05:10

Quote: Originally posted by Pyro

not really chemistry, but i found this insect collection that i bought at a yard sale a few yrs ago for 5 eur. somebody had borrowed them and apparently neglected them as there is a little mold.

You should put some naphtalene or camphor inside to sterilize it. It's a nice collection.

Pyro - 12-4-2013 at 05:36

Yeah, there was something in it but it must have worn out. not aristobia sp. is all mouldy. what do you think, remove the mouldy bug and look around for a replacement or leave it how it is?

Endimion17 - 12-4-2013 at 06:27

I'd leave everything inside and just put a spoonful inside. They don't make the color go away, and they kill every bacteria, fungus and little critter inside. I recommend camphor pill because that way you can keep it in your room, keep away moths and it smells rather nice.

Mailinmypocket - 13-4-2013 at 03:17

Curcumin, from 28g of tumeric.

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