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dex_sda posted:you say that but if that's what happened at school I'd never have missed a day Yes, but presumably a trained professional would be the one doing everything and I wouldn't be allowed anywhere near that poo poo myself. I know they have a "don't try this at home" thing at the end, but it's certainly presented like one of those "Here's some cool science experiments you can do yourself!" videos.
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Sep 10, 2015 12:36
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As a trained professional, I expect that MazeofTzeentch will be reading you all my obituary shortly after I get a decent workspace. Not much exciting chemistry to be done in an apartment besides metal finishing.
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Sep 10, 2015 13:01
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ArcMage posted:As a trained professional, I expect that MazeofTzeentch will be reading you all my obituary shortly after I get a decent workspace. Not much exciting chemistry to be done in an apartment besides metal finishing. Only if you promise to do the same for me. I should not be entrusted with a back yard
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Sep 10, 2015 13:36
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MazeOfTzeentch posted:Only if you promise to do the same for me. Countdown to lost fingats...
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Sep 10, 2015 14:13
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dex_sda posted:you say that but if that's what happened at school I'd never have missed a day Things I remember from high school chemistry: -Thermite -Popping candy into molten potassium chloride (a laffy taffy at the end of the day filled the entire room and hallway with smoke) -A gauss cannon powered on 120v AC (this one isn't really chemistry related, my teacher just REALLY wanted to punch a hole in a ceiling tile. Came pretty close, IIRC.) -A demonstration of why you should be careful not to get silver nitrate on your skin ("In retrospect, I should probably have just told you what happens instead of showing you. That's not gonna come out...") -Bringing in an entire tub of dry ice for us to play with. Yes, one idiot managed to burn himself. I'm sure I'll remember more.
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Sep 10, 2015 15:09
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KillHour posted:Things I remember from high school chemistry: All the good science teachers are slightly insane.
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Sep 10, 2015 15:23
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Not as bad as discussed above, but I saw a video a while ago showing how to find the high-voltage cathode pin on a CRT flyback transformer. The guy wrapped a few turns of magnet wire around the exposed core, pulsed power through it, and moved the anode cup near the pins to see which one the spark arcs towards. I thought he was crazy, but it turns out that it really is the best way to do it and I've done it a few times myself.
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Sep 10, 2015 15:33
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MazeOfTzeentch posted:Only if you promise to do the same for me. Anything for you  I had a small assortment of pyrotechnic colorants that made for an entertaining bonfire a bit ago, and in the other direction, I've got 5/3 of a PA amp that needs concatenation.
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Sep 10, 2015 15:45
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jetz0r posted:All the good science teachers are slightly insane. I remember sitting through a lecture one day in 10th grade chemistry, and from down the hall hearing a massive explosion followed by some kid yelling "OOOOHHHH DO IT AGAIN!!" The combustion unit is everyone's favorite.
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Sep 10, 2015 16:16
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Sex Hobbit posted:I remember sitting through a lecture one day in 10th grade chemistry, and from down the hall hearing a massive explosion followed by some kid yelling "OOOOHHHH DO IT AGAIN!!" One of my favorite demos was the "tent warmer". I had an old paint can with a hole punched in the center top and on the side near the bottom. I would fill it with natural gas and with a finger cleverly placed over the lower vent hole, would light the gas at the top. I would introduce it then as something clever I saw in a camping magazine. You could take it with you on a hike, filled with gas, and it would provide a small flame to warm your tent at night. The kids were generally wtf about it, so I would shrug and set it aside, then go on with the lesson. Over time, air would enter through the hole at the bottom, and as the gas got increasingly oxygen rich, the flame would get smaller and lighter, until it was completely invisible and the kids forgot all about it. Then after almost exactly 5 minutes it would explode, blowing the lid clear to the ceiling. It was very effective at getting their attention.
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Sep 10, 2015 17:05
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KillHour posted:Things I remember from high school chemistry: My dad's favorite demo from his days as a high school chemistry teacher was to add potassium chlorate to the standard sugar and sulfuric acid demo. One year he did it in a hood that vented over the school courtyard, and it belched clouds of black smoke out over everyone eating lunch there.
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Sep 11, 2015 00:49
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dex_sda posted:you say that but if that's what happened at school I'd never have missed a day I high school a science teacher who did potassium in water, but ended up putting too much in...good times. He also told us that a student from years past had managed to steal a sizeable chunck of potassium which he then flushed down the toilet...
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Sep 11, 2015 18:05
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There was a kid in my HS who thought it'd be cool to pocket a chunk of sodium from chemistry class (right after a demo of how it reacted with water). The chunk didn't enjoy his sweaty jeans, so he wound up with badly burnt nuts. Edit: now that I'm remembering (this was back in '84-'85), he felt it getting hot in his pocket and ran to the bathroom and splashed water on it. I wasn't in his class but I remember him screaming and there was definitely a burning smell in the hallway afterwards.
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Sep 11, 2015 21:18
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jetz0r posted:All the good science teachers are slightly insane. I can't remember his name but one of the science teachers at my high school would take a large coffee can, poke a hole in the lid, fill it with hydrogen and light the escaping gas to make a candle. He'd proceed to tell us all a ghost story saving the very last line for when the flammability limit was reached and boom.
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Sep 11, 2015 22:17
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Un chien andalou posted:I high school a science teacher who did potassium in water, but ended up putting too much in...good times. He also told us that a student from years past had managed to steal a sizeable chunck of potassium which he then flushed down the toilet... My grandfather may or may not have made a pipe bomb for a science club activity in high school and may or may not have detonated it in a lab sink at said high school causing the blast to resonate through the entire plumbing system of the building... Enourmo posted:Back when I was in HS one of the chem teachers got arrested for teaching kids how to make a bomb. Same grandfather helped my uncle make moonshine for a science project in elementary school. Powerlurker has a new favorite as of 01:12 on Sep 12, 2015 |
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Sep 12, 2015 00:14
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Un chien andalou posted:I high school a science teacher who did potassium in water, but ended up putting too much in...good times. He also told us that a student from years past had managed to steal a sizeable chunck of potassium which he then flushed down the toilet... My Junior year high school chemistry teacher did this as well. He was telling us about the properties of Potassium and its reactions while he pulled this chunk of potassium out of a jar of mineral oil and shaved a little bit off of it, then threw the remaining big chunk into the beaker of water in front of him and the little sliver back into the jar of oil. I remember he stopped immediately after he did that and just calmly went "oh, poo poo" and pushed the beaker into the big lab sink in the middle of the lecturer's table. Apparently people on the other side of the school heard it go off.
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Sep 12, 2015 00:28
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Back when I was in HS one of the chem teachers got arrested for teaching kids how to make a bomb.News Article posted:...used an overhead projector in class to give instructions in making explosives to students at Freedom High School, including advising them to use an electric detonator to stay clear from the blast, an Orange County sheriff's arrest report said. So this wasn't just "Hey, this reaction is highly exothermic  ".quote:One student said he set off an explosive device at a golf course on Jan. 6 and videotaped it, an arrest warrant said. The videotape shows an explosion, and the voice of a young man can be heard shouting, authorities said. "Honest, officer, it was just a repid deflagration! The ensuing rupture of the containment vessel was entirely coincidental!" quote:Pieski guided investigators to an unlocked metal cabinet in the back of a classroom, where there was "a can of black powder stored next to other chemicals," the sheriff's office said. Black powder around high school students, excellent. I swear I saw video of it back then, but I'm not digging around to try and find it 10 years after the fact. E: I know "explosion" is often used for "large slow-moving fireball" and I believe that was the case here now I think of it, but still. Fender Anarchist has a new favorite as of 00:44 on Sep 12, 2015 |
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Sep 12, 2015 00:42
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Pointless story follows: I had a chemistry teacher many years ago that made the most wonderful substance. I never found out how he made it as he unfortunately died the following year from cancer. It was called "Jippo-shack" cologne (nothing to do with Roma, it's just a saying up in northern MN for a logging shack that you stay in for the winter). He would tell a rambling story about how he knew a logger who would never change his long johns all winter and the hair would eventually grow all the way through and he couldn't take them off. So he would shave off the long johns, boil them, and make cologne from them. My teacher would then take a glass rod and take out a small amount of brown liquid from a graduated cylinder. He would have you smell it and you wouldn't smell anything. He would say, touch it and take a whiff from your finger. Once the liquid touched your skin, it would stain it brown for a week and smell like the worst BO mixed with rear end you've ever imagined for a full day. You had to use mineral spirits or gasoline to get the smell off and even then you could still detect a little of the rear end smell. It was the best chemistry trick I've ever seen and I've never heard of how it's done.
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Sep 14, 2015 03:07
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^^^ I suspect that if someone tells what that was I'll facepalm and say "I shoulda known". But I have no idea right now, sorry. Anyway, from the SAL chemistry thread: Enourmo posted:Periodic Videos has been busting glass capsules of alkali metals underwater.
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Sep 16, 2015 23:10
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We had some dumbass kid in my chemistry class manage to get the chemical they use to ID fingerprints on his arm. That particular chemical reacts with organic molecules and produces molecules that like to reflect as purple, ie it turns your skin purple. He had a giant sploch of his arm turn purple because he sprayed it all over himself. Also, new thread title: The Something Awful Forums > Discussion > Post Your Favorite (or Request) > PYF dangerous chemicals/etc:The most metal way to die
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Sep 17, 2015 00:57
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Come to think of it, ever heard of a supersaturated solution? Want to watch a dumbass with his hand in one as the solute comes out of solution? https://www.youtube.com/watch?v=xy56zzVAaJc Skip to 2:00 for beautiful schadenfruede.
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Sep 17, 2015 00:58
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A White Guy posted:Come to think of it, ever heard of a supersaturated solution? Want to watch a dumbass with his hand in one as the solute comes out of solution? And here's someone doing the same thing with no ill effect. https://www.youtube.com/watch?v=7HDZI2rwyHg
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Sep 17, 2015 01:08
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Yep. LA Beast kind of hams it up for the camera, because that's where his money comes from. Mind you, he's done a number of other staggeringly stupid things which have done him great harm on occasion, but I'm inclined to believe the hot ice was more bark than bite. It is a pretty neat little trick, and I recall hearing that mild scalding is a concern, but I dunno, is it even possible to gently caress it up that badly?
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Sep 17, 2015 01:14
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Shady Amish Terror posted:I dunno, is it even possible to gently caress it up that badly? Exothermic reactions are no joke. Girl loses 8 fingers after submerging her hands in plaster: http://www.theguardian.com/education/2009/oct/12/girl-loses-fingers-school-art
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Sep 17, 2015 01:23
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Shady Amish Terror posted:Yep. LA Beast kind of hams it up for the camera, because that's where his money comes from. Mind you, he's done a number of other staggeringly stupid things which have done him great harm on occasion, but I'm inclined to believe the hot ice was more bark than bite. It is a pretty neat little trick, and I recall hearing that mild scalding is a concern, but I dunno, is it even possible to gently caress it up that badly? It looks pretty thoroughly staged. I find it hard to believe that was their first and only take. His hand wasn't even red when he pulled it out of the toilet. Pretty bad acting overall, IMO.
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Sep 17, 2015 01:33
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The sodium acetate tryhydrate should get up to 58C. Water at 55C can cause serious burns in about 5 seconds. There's some differences because of the relative heat capacities and the fact that water can convect, but that's still hot enough to pasteurize your hand. I dunno if NurdRage is using an excess of water or just has incredibly thick skin or something.
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Sep 17, 2015 01:42
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Dilb posted:The sodium acetate tryhydrate should get up to 58C. Water at 55C can cause serious burns in about 5 seconds. There's some differences because of the relative heat capacities and the fact that water can convect, but that's still hot enough to pasteurize your hand. I dunno if NurdRage is using an excess of water or just has incredibly thick skin or something. You're off by a little bit. Burn threshold for touching bare metal/water at 55 degrees C is ~9 seconds, but water/bare metal conducts better than just about anything else - for the same effect you'd need to be touching a plastic surface at 70 C or glass/ceramic at 66 c.
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Sep 17, 2015 02:03
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jetz0r posted:All the good science teachers are slightly insane. Back when I was in HS I went into my science classroom and three chemistry teachers were all crowded around a bunsen burner that had a cone with soapy water inside. Once it got enough bubbles they would ignite them and watch the flames reach the top of a 15 foot ceiling. They also made sure to tell all the students coming in to never do this.
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Sep 17, 2015 17:57
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Control Volume posted:Back when I was in HS I went into my science classroom and three chemistry teachers were all crowded around a bunsen burner that had a cone with soapy water inside. Once it got enough bubbles they would ignite them and watch the flames reach the top of a 15 foot ceiling. They also made sure to tell all the students coming in to never do this. I would attach a rubber hose to the bottom of a glass funnel, then put soap solution in a petri dish. I could blow huge methane bubbles (about 6" across), which would float to the ceiling and I would ignite with a candle taped to the end of a meter stick. Very big "whoosh" when they ignited.
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Sep 17, 2015 18:12
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Deteriorata posted:I would attach a rubber hose to the bottom of a glass funnel, then put soap solution in a petri dish. I could blow huge methane bubbles (about 6" across), which would float to the ceiling and I would ignite with a candle taped to the end of a meter stick. https://www.youtube.com/watch?v=MMOZGG_2QYc&t=1590s
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Sep 17, 2015 19:10
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A White Guy posted:We had some dumbass kid in my chemistry class manage to get the chemical they use to ID fingerprints on his arm. That particular chemical reacts with organic molecules and produces molecules that like to reflect as purple, ie it turns your skin purple. He had a giant sploch of his arm turn purple because he sprayed it all over himself. There's two very beautifully vivid, very staining purple fingerprint dyes- Gentian Violet, which is hella purple, washes off easily and is incredibly safe (incidentally, they still use a less concentrated solution of it to treat trush in breastfeeding mothers and their babies, you just paint the stuff on the boob and then let the baby feed. Google has some incredible pictures of babies with bright purple grins, looking like freaky little aliens) And then there's the one I suspect your dumbass friend used, which is called ninhydrin, and reacts beautifully with the amino acids in your body to produce a colour known as Ruhemann's purple. It's a remarkably effective developer of fingerprints on paper when dissolved in acetone or methanol and the paper then gently heated in humid conditions. Although care must be taken to have analysis of the contents and writing of the paper done beforehand as the methanol solvent tends to dissolve the ink. (And it's freaking hilarious when it happened in the forensic science unit at my old college too, there's always one kid who ignores the teachers instructions in the fingerprints unit, does his document analysis out of sync and then squeals like a baby as the written evidence gently dissolves away in the ninhydrin bath.)
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Sep 17, 2015 19:54
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Btw, slight aside but I've been trying to remember the title of a book about industrial chemistry of similar vintage to "Ignition!" written by a guy who ran a fine chemicals company in the US and the strange orders he fulfilled over the years. Several of them were of the "Things I will not work with" variety. Does that ring a bell with anyone?
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Sep 24, 2015 21:02
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Munin posted:Btw, slight aside but I've been trying to remember the title of a book about industrial chemistry of similar vintage to "Ignition!" written by a guy who ran a fine chemicals company in the US and the strange orders he fulfilled over the years. Several of them were of the "Things I will not work with" variety. You're probably thinking of "Excuse me sir, would you like to buy a kilo of isopropyl bromide?" by Max G. Gergel.
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Sep 24, 2015 21:09
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KozmoNaut posted:You're probably thinking of "Excuse me sir, would you like to buy a kilo of isopropyl bromide?" by Max G. Gergel. That's the one! To no one's surprise the place where he had his chemical works only narrowly missed being an EPA superfund site.
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Sep 24, 2015 21:16
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Crossposting from the comic strip megathread 'elpful 'enry (1926)  seems to be an accurate methods paper for the nastier stuff in this thread.
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Oct 6, 2015 05:43
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It does boggle the mind what sort of poo poo was once handled with little more than a leather apron and either too much or too little will to live. Actually that's still kind of true sometimes.
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Oct 6, 2015 11:42
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RIP Marie Curie
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Oct 6, 2015 11:58
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SynthOrange posted:RIP Marie Curie Marie Curie forced her lab employees to work with the same non-existent safety standards she did, even after it was long known that the radiation they work with makes people very sick. She told them it'd be fiiiiine and safety wasn't nearly as important as getting the science done in time. Most of her workers died of cancer at a young age because of that. She was a horrible employer. Sorry if I just destroyed the good image of your idol.
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Oct 6, 2015 12:36
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She was just who I pulled up out of general knowledge as 'worked with unsafe poo poo in unsafe conditions' where's any idol worship?
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Oct 6, 2015 12:45
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SynthOrange posted:She was just who I pulled up out of general knowledge as 'worked with unsafe poo poo in unsafe conditions' where's any idol worship? I meant it more as a general thing than directed at you. Some people see her as THE icon of women in science.
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Oct 6, 2015 13:16
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