| Pages:
1
..
28
29
30
31
32
..
38 |
Texium
Administrator
Posts: 4508
Registered: 11-1-2014
Location: Salt Lake City
Member Is Offline
Mood: PhD candidate!
|
|
Quote: Originally posted by mayko  | This has been a bad *summer* in the lab, or rather out of it b/c it's so hot in the shed that the hot surface warning sensor on the hot plate trips
 |
I feel for ya man. The other day I saw
that my thermometer, sitting in a drawer in my lab bench, was reading 42ºC. This summer I've had to get up early in the morning any day I've wanted
to do anything in my lab, and by 11AM I have to come back inside the house. On some days I've actually gotten up at 5AM and gotten into the lab before
dawn, and that's great but I can't seem to keep that schedule up for more than a few days at a time.
|
|
|
myristicinaldehyde
Hazard to Others
Posts: 166
Registered: 23-4-2016
Location: .͐͌ ͛҉̻̫̰̻̖E̮ͮ̐́̚ ̢̗̅̉ͩ͂̒̌.̯̻̺̯̀̎͂̄ͩ̚
Member Is Offline
Mood: сорок пять
|
|
I was mass extracting aspirin from tablets, but using my hot plate rather than microwave. I used a round bottom with water to allow a surprisingly
effective reflux, but I put the stopper harder in than I thought. Instead of leaking steam, it popped out with incredible velocity, followed by the
lovely tinkling of Chinese glass :/ Oops.
|
|
|
Texium
Administrator
Posts: 4508
Registered: 11-1-2014
Location: Salt Lake City
Member Is Offline
Mood: PhD candidate!
|
|
Dude. Don't heat a closed system. Ever.*
*Unless of course it's an apparatus that's meant to operate at high pressure, but that's another story.
|
|
|
myristicinaldehyde
Hazard to Others
Posts: 166
Registered: 23-4-2016
Location: .͐͌ ͛҉̻̫̰̻̖E̮ͮ̐́̚ ̢̗̅̉ͩ͂̒̌.̯̻̺̯̀̎͂̄ͩ̚
Member Is Offline
Mood: сорок пять
|
|
And check first if it is a closed system!
|
|
|
Texium
Administrator
Posts: 4508
Registered: 11-1-2014
Location: Salt Lake City
Member Is Offline
Mood: PhD candidate!
|
|
I mean, if it has a stopper in it, I'd definitely consider that to be closed whether the stopper was loose or not. If you don't want it to be
completely open, stick a thermometer adapter or something in there. Or better yet, a condenser.
|
|
|
XeonTheMGPony
International Hazard
Posts: 1636
Registered: 5-1-2016
Member Is Offline
Mood: No Mood
|
|
| Quote: Originally posted by zts16 | | I mean, if it has a stopper in it, I'd definitely consider that to be closed whether the stopper was loose or not. If you don't want it to be
completely open, stick a thermometer adapter or something in there. Or better yet, a condenser. |
or a bubbler air lock!
My hand healed up well from a beaker that shattered in my hand while I was drying it, you got to be all ways care full and vigilant with glass from
any place!
[Edited on 23-8-2016 by XeonTheMGPony]
|
|
|
JnPS
Hazard to Self
Posts: 90
Registered: 29-7-2016
Location: PA, USA
Member Is Offline
Mood: Umpolung
|
|
Another one *DJ Khaled voice*
Attachment: Broken 100mL GradCylinder.docx (320kB)
This file has been downloaded 512 times
|
|
|
ave369
Eastern European Lady of Mad Science
Posts: 596
Registered: 8-7-2015
Location: No Location
Member Is Offline
Mood: No Mood
|
|
Today was a really bad day in my lab. I was synthesizing hydroiodic acid by hydrolyzing phosphorus triiodide. First, I got a nice, clear mixture of
hydroiodic and phosphorous acids. Then the distillation flask fell from the apparatus and I had a minor spill of the mixture.
But wait. There is more! It turned out that my Liebig condenser had some minuscule amount of sulfuric acid from my previous experiment. When HI
started distilling, it reacted with this sulfuric acid, and I got milky white distillate with a smell of hydrogen sulfide!
Of course, I immediately stopped the distillation.
Results: 80% of my solid iodine stockpile was depleted in vain. I got no hydroiodic acid. People, watch out for dirty Liebigs before you start any
distillation!
Smells like ammonia....
|
|
|
Arg0nAddict
Hazard to Self
Posts: 54
Registered: 8-6-2016
Location: PNW
Member Is Offline
Mood: Mercuric
|
|
Well I can't compare to that I think I snapped the cheapest 24/40 adapter in existence. 90° Gas outlet/inlet
|
|
|
Sulaiman
International Hazard
Posts: 3558
Registered: 8-2-2015
Location: 3rd rock from the sun
Member Is Offline
|
|
today I was experimenting, developing a diy magnetic stirrer
I put the spinning magnets too close to my one and only large beaker ...
it was so useful
on the brighter side, I now have plenty borosilicate shards to test as column packing 
CAUTION : Hobby Chemist, not Professional or even Amateur
|
|
|
aga
Forum Drunkard
Posts: 7030
Registered: 25-3-2014
Member Is Offline
|
|
The Rule-of-10/4 :-
If it looks useful, buy 10.
By next week you'll have at least 4 left.
|
|
|
j_sum1
Administrator
Posts: 6219
Registered: 4-10-2014
Location: Unmoved
Member Is Online
Mood: Organised
|
|
Not a personal story but interesting nonetheless. 50 grams of Cs worth a whole lot of dollars.
https://youtu.be/ytxx95g-kiA?t=1m57s
He blames the fact that he was working with it in liquid form. I think his method for opening the ampoule is more to blame. He would have been
better to have the whole thing submerged.
Fortunately he was able to redo everything with a fresh 50g of caesium. (gasp)
As an aside, is it just me or have other people noticed more and more amateur chemist YT contributors opting for commercial sponsorship lately?
|
|
|
elementcollector1
International Hazard
Posts: 2684
Registered: 28-12-2011
Location: The Known Universe
Member Is Offline
Mood: Molten
|
|
I've noticed more popular YT channels in general getting sponsored lately. I think businesses are catching on to the fact that these are a new and
more marketable form of 'celebrity.'
Interesting to see that caesium is somewhat stable when coated with oil - I would have thought not even that would stop it.
Elements Collected:52/87
Latest Acquired: Cl
Next in Line: Nd
|
|
|
adk
Hazard to Self
Posts: 97
Registered: 28-10-2014
Location: Sydney, Australia
Member Is Offline
Mood: No Mood
|
|
I broke two really nice pressure equalised addition funnels and a condenser on the same day. Saving 2 minutes to get another clamp cost $500
Never forget to clamp glass properly.
|
|
|
Cryolite.
Hazard to Others
Posts: 269
Registered: 28-6-2016
Location: CA
Member Is Offline
Mood: No Mood
|
|
I was distilling some benzyl chloride with plastic Keck clips. I shifted the glassware slightly, the clip holding the boiling flask melted and broke,
the boiling flask fell, the boiling flask shattered, I got a face full of benzyl chloride. Last time I make that mistake again!
|
|
|
ave369
Eastern European Lady of Mad Science
Posts: 596
Registered: 8-7-2015
Location: No Location
Member Is Offline
Mood: No Mood
|
|
Yes, it behaves pretty much like Willy Pete, slowly reacting with air, melting itself and finally igniting.
Smells like ammonia....
|
|
|
Fidelmios
Hazard to Others
Posts: 104
Registered: 28-4-2016
Location: Witty Chemistry Joke
Member Is Offline
Mood: No Mood
|
|
I lost about 20% of my beakers two nights ago. I stupidly let my crystallization progress too long, and I was forced to drill the solid out with a
knife, cracked a hole in the bottom of the glass. My other glassware fault was a thermal shock, due to the cooling temperature of nature. Damn thee
vile mistress!
(Yes I only have 10 beakers)
|
|
|
Toady
Harmless
Posts: 15
Registered: 16-10-2016
Location: Beyond the pale
Member Is Offline
Mood: PISSED
|
|
Lets see now.
Recently:
A red phos/I2 reduction about 4/5ths of the way through setup. Only accidental clogging of the bore of the flask neck, thought it was merely a coating
spread along the surface where a little moisture had adhered some red P to the inner surface of the flask neck, only it wasn't, and by the time I'd
realized it was actually a clogged neck, from using too narrow a flask, but, after addition of water, not realizing what had happened, had to sort the
clog out by poking down the remaining P bit by bit (or rather, trying to)
It all went down at once, taking a splash of the water used to initiate the rxn and form HI(aq) along with it. Result? kicking off something fierce,
rapid evolution of a HUGE plume of noxious acidic fumes, HI, PI3 and enough iodine vapor to leave my face, where unprotected by goggles and mask,
looking like a panda in reverse. A laevo-panda, if you will
Had enough time to notice the 'plop' noise as a sizeable proportion of the phos and H2O slam dunked into the flask to think 'oh sHIIIi...!!; stepped
back just in time to avoid the resulting krakatoa in microcosm.
That fucked up my calculations, owing to inability to calculate the quantity lost, seeing as the glassware itself had not been weighed beforehand,
and lost a fair bit of the volatile elements of the reaction.
Did manage to salvage things by adding a bit more RP and a gram or two more of I2 to compensate for losses. Not my best work or finest hour.
And a less hazardous but perhaps nastier wee bit of squirrelyness.
Hotplate bust a gonad somewhere in the thermstat, and unbeknownst to Tsath', the damnable thing had gone and heated what was meant to be refluxing at
110-120 'C, had instead, been roasting at about 460-470 'C
Diethylene glycol in the heating bath absolutely stank something rotten. Its not strong, but it gives off this appalling, subtle
sweetish-rancid-stagnant kind of stench when overheated to that temperature. Could smell it from several rooms in the house away through closed doors,
don't quite know what it is thats so bad about it, as such, but it is, and fair made my guts heave.
Quite some time ago:
Distilling chromyl chloride, bottom of the still cracked and dropped out. Splattered the best part of a liter of 98% H2SO4, and stoich. quantities of
NaCl and dichromate. Forgot which, potassium or sodium, either way, narrowly avoided getting doused from the waist down in the above, plus a few
hundred ml, maybe a bit over a quarter liter, 300-350ml roughly.
Nasty, messy cleanup that was, cut away a section of contaminated bench top and replaced it with thick plywood. Not ideal but its the best I could
rustle up at zero notice.
Had to rescue my £250-300 microscpe another time, after a company sent me a 4 gallon drum of conc. hydrochloric with a crappy tap that leaked vapors
and over time, corroded the everloving shit out of a lot fo the metal stuff in the lab. Thankfully the optics and moving parts are unaffected and some
lovingly applied acid to the stage of the 'scope got rid of the green color (nickel or chromium from the color I think) and a little tarnishing of the
brass here and there on the lenses.
And last but not least, a permanent thickening of the palm of one hand, crappy skin condition there after spilling SOCl2 and having it eat right
through the thickish leather gloves I was wearing at the time, then carry on going, right down to the muscle. Careless of me, but at the time I was
just a little kid.
|
|
|
Brom
Hazard to Self
Posts: 94
Registered: 19-7-2015
Member Is Offline
Mood: No Mood
|
|
This morning i had butter fingers and a 3/4 full gallon bottle of 50% H2O2 broke when i dropped it. And it was plastic! When it contacted the grass
outside it started reacting and putting off steam. Now this stuff if left on a paper towl will combust in a matter of minutes. So it made a mess and i
lost all my peroxide so i need to get more now. Not good start to the day. Luckily i can get the 50% stuff very easily and cheap.
|
|
|
JJay
International Hazard
Posts: 3440
Registered: 15-10-2015
Member Is Offline
|
|
I took my brand new 600 mm reflux condenser out of the package yesterday only to discover that the internal coil was broken.
The seller is a reputable one and gave me an immediate refund. I guess with a little work I'll have a 600 mm Hempel column.
|
|
|
Dr.Bob
International Hazard
Posts: 2656
Registered: 26-1-2011
Location: USA - NC
Member Is Offline
Mood: No Mood
|
|
Managed to get a large oval stirbar stuck in the neck of a 1L flask while pouring the product out of my reaction , almost 60 grams of a valuable
intermediate, thankfully got most out before that, then when I turned the flask back upright slowly to try to get it to come loose, it popped back
into the flask, right through the bottom of the flask. Still lost some material as hard to rinse the reaction contents from the flask then, but lost
one of my favorite flasks. Just thankful not to have spilled much of the material in the process, also very acidic reaction, and I did not manage to
spill much acid in the hood, which was nice.
|
|
|
Texium
Administrator
Posts: 4508
Registered: 11-1-2014
Location: Salt Lake City
Member Is Offline
Mood: PhD candidate!
|
|
I was all ready for a good chemistry day today, when while I was making my morning tea I accidentally swept my hand over the spout of the kettle. Got
a nasty steam burn to show for it, and now I'm not sure if I'll be able to do anything since it'll be hard to wear gloves, and I certainly don't want
to expose the soft unweathered skin to potential chemical attack.
Edit: it is however making me wonder now if I could somehow convert a cheap, secondhand electric kettle into a steam bath...
[Edited on 12-28-2016 by zts16]
|
|
|
aga
Forum Drunkard
Posts: 7030
Registered: 25-3-2014
Member Is Offline
|
|
Ouch !
Hope it heals up quickly to chemical-resistant status.
Washing-up tends to destroy more glass here than the actual usage. Today's loss was the drip spout on the new, only-used-once 250ml fritted vac
funnel.
Saves having to clean the brown stuff out of the frit, so not all bad.
|
|
|
Texium
Administrator
Posts: 4508
Registered: 11-1-2014
Location: Salt Lake City
Member Is Offline
Mood: PhD candidate!
|
|
Only the drip spout broke? Seems like you should still be able to use it.
|
|
|
aga
Forum Drunkard
Posts: 7030
Registered: 25-3-2014
Member Is Offline
|
|
Vac will suck the liquid into the pump like mad without that bit of glass to prevent it.
Better to just get a new one.
To be honest, i do not really know what it's for (the entire fritted filter thing) so no great loss.
[Edited on 28-12-2016 by aga]
|
|
|
| Pages:
1
..
28
29
30
31
32
..
38 |
![[*]](images/xpblue/default_icon.gif){kind=icon}
