I love arrowheads, especially obsidian ones...in 7th grade we went to a Native American historical preservation, there was an older man sitting at a table making an arrowhead out of obsidian with a couple pieces of leather and antler. Me and a bunch of kids started watching him, and they all eventually went to look at other things, but I stood there and watched him the entire time...I dont remember either of us saying a word to each other other than hello. He was finishing it as our field trip was ending, he glanced around, wrapped it in a piece of paper and handed it to me and just said 'shhh'. I gently stuffed it in my pocket and proceeded to hold the biggest secret of my life the entire bus ride back to school, the last hour of school, and the bus ride home before I could have a little freak out about him giving it to me. I pulled it out of my pocket, unwrapped it and marveled at it, it was huge, and sharp, and you could see right through it, totally blew my mind. That was nearly 30 years ago, I still have it, wrapped up safely in a box that I open occasionally when nostalgia gets the better of me. ...now if you'll excuse me, theres a box I need to look at...
@brokenacoustic
Жыл бұрын
I found it, then recorded it, then wrote a song for it, then recorded it, then mixed them, then uploaded it, now I'm posting it...thanks Cody! lol
@Gabriel-nf8eb
Жыл бұрын
That's really cool!
@christianterrill3503
Жыл бұрын
There is a guy on KZitem that does that for videos. All different styles of flint napping
@brokenacoustic
Жыл бұрын
@@Gabriel-nf8eb Thanks, it was definitely one of the better moments of schooling lol
@brokenacoustic
Жыл бұрын
@@christianterrill3503 Yeah I've watched a few, I've got obsidian and flint, but have yet to give it a try. One of these days...
@bairnonessie
Жыл бұрын
"No! Don't lower me in the acid!...blerglglg"
@tau9632
Жыл бұрын
Hahahah yeah I loved that
@FishPit
Жыл бұрын
I almost choked on my food. Ahahah
@CaveChronicles
Жыл бұрын
Hello, how are you? I am under the water. Ululululu
@mikeh4271
Жыл бұрын
I came here to make that same quote. Lol!
@barszczykczerwony176
Жыл бұрын
Yeah, that's going to be memed to oblivion
@666kaamos666
Жыл бұрын
Every chemistry teacher in the history of mankind: "Always pour acid into water" Cody: "Don't tell me how to live my life"
@mariohendriks1
Жыл бұрын
I once poured water into oleum. It was quite an exciting experience.
@indigo_carmine
Жыл бұрын
to be honest you should be ok unless you work with oleum or fuming nitric acid.
@hammerfix7241
Жыл бұрын
why?
@AkiSan0
Жыл бұрын
unless its highly concentrated and a medium to high amount of acid, nothing much happens except for mostly a slight rise in temperature. try that with a lot of oleum and its a different story...
@lajoswinkler
Жыл бұрын
Every good chemist knows it only applies for few acids like concentrated sulfuric, perchloric, oleum. It's perfectly useless rule for other acids. Nothing will happen if you pour water into concentrated nitric or acids made from hydrohalogenides.
@rockbutcher
Жыл бұрын
We used to use HF to dissolve quartz that held lode gold nuggets to improve the specimens. Scary stuff even for a Geochemist. We didn't dilute ours though so it worked faster and we could direct it where we wanted rather than just dunking the whole chunk. In regard to your results, you need to remember that while Chert and Agate are primarily composed of quartz (a silicate mineral), Obsidian is simply rapidly cooled lava which contains many minerals other than silicates and those would resist the acid.
@nunyabisnass1141
Жыл бұрын
Im terrified to touch the stuff, so i would probably just use hot sodium hydroxide.
@HESDONEIT
Жыл бұрын
fellas he's literally named rockbutcher, i'd trust him
@teeanahera8949
7 ай бұрын
Do you seriously think you can give Cody a lesson in geology. Hilarious.
@rockbutcher
7 ай бұрын
@@teeanahera8949 Given that I have been a Geologist for longer than Cody has been walking? Yes I do.
@seeharvester
3 ай бұрын
Did you ever dissolve any claim-jumpers?
@dwaynezilla
Жыл бұрын
Cody is exactly the kind of person I would expect to have a (maybe) 14-year-old bottle of HF just lying around like it's no big deal.
@duncanfox7871
Жыл бұрын
Other comments talking about how dangerous 50% HF is. Me over here just glad he wore gloves when pouring it this time
@Fabi33677
Жыл бұрын
they do something similar for fishing hooks. Sometimes you will find written on the packaging "chemically sharpened"
@SpaghettiEnterprises
Жыл бұрын
Same deal with a lot of college students
@FirstLast-gw5mg
Жыл бұрын
Hydrofluoric acid is high on my list of things that I don't want to play with.
@ex5080
Жыл бұрын
Probably a smart idea
@huathai8204
Жыл бұрын
Next on Cody's list chlorine trifluoride aka "human kryptonite"...
@VincentGroenewold
Жыл бұрын
I did in my scientific career, boy did I take precautions. I also played with a solution that had the warning not to breath any vapor in or spill whatever, it would rupture my red blood cells immediately and I would suffocate. Joy :)
@sanityormadness
Жыл бұрын
Next time: Can you swim in mercury? "Of course, the greatest problem is the density of mercury makes it incredibly difficult to immerse yourself. This is why I'm going to be wearing these uranium waders..."
@Karreth
Жыл бұрын
Cody has done the floating in mercury video already, actually. He wore boots, though.
@sean..L
Жыл бұрын
Dipping miscellaneous things into strong acid is a simple yet fascinating idea for experiments. So many possibilities!
@jacktobias9059
Жыл бұрын
As an archaeology student, this is both horrific and fascinating
@MCGR
Жыл бұрын
they are modern recreations of arrow heads
@jacktobias9059
Жыл бұрын
I know don't worry! Obviously Cody's a lil smarter than that xD
@refluxcatalyst7190
Жыл бұрын
As a chemist, it's just horrifying. This dude's lack of....just about every precaution is alarming.
@AnyMotoUSA
Жыл бұрын
Makes me think of the myths of when the Inca could melt and shape stone with a solution they poured over the boulders
@Ch3mG33k
Жыл бұрын
@@refluxcatalyst7190 What precautions was he missing? Proper "glass"ware, had a nice bed of lime, wore gloves, has a fan? Honestly y'all armchair chemists have probably never even set foot in a real lab lol.
@danicajohnson2664
Жыл бұрын
Cody really likes playing with the most dangerous chemicals possible LOL
@patrickmihajlovic4112
Жыл бұрын
So WE dont't have to do it...! 😉😂
@cult-of-sporque
Жыл бұрын
Today we're looking at sarin and ricin, and their etching effects on different containers. ... Shows ingredients ... That fan you hear is taking care of any potential fumes, and we are downwind from any major metropolitan area, so we we're safe.
@GaiusCaligula234
Жыл бұрын
@@cult-of-sporque Neither have etching properties, and neither sarin not ricin are particularly volatile
@cult-of-sporque
Жыл бұрын
@@GaiusCaligula234 OK. Instead we're going to use some liquid nitrogen to condense both of them to liquid form, and then mix together within a pressurized vessel? Our goal today is to find a just-the-right mixture, that allows us to induce a slush-like substance that you can use tp disinfect your chicken coop.
@GaiusCaligula234
Жыл бұрын
@@cult-of-sporque Son, sarin is liquid in room temperature
@chambon818
Жыл бұрын
A before and after weighing would have been interesting to see how much mass the acid removed.
@newq
Жыл бұрын
The balls on this guy. Hydrofluoric acid scares my pants off! My chemistry lab TA in college would scold us if we even do much as wrote fluorine ions in our notes. She'd say "You should NEVER be making this ion!" and then told us some horror stories about HF. Then there's the geology grad students. I remember walking past the geology lab once and I saw a grad student in there nonchalantly eating her lunch on a table below a shelf with a bottle labeled "hydrofluoric acid, contact poison" and a skull and crossbones. Only geologists have the balls for such shenanigans. Hey... isn't Cody a geologist? See? I told you. They fear nothing!
@lxlotl
Жыл бұрын
I was just about to eat lunch, after being sat in front of an instrument at work for 6 hrs straight, looking for something to watch while I eat. Seeing a new Cody's Lab video made me feel a lot better 😊
@MartinBogomolni
Жыл бұрын
Cody Don - this is some of the most absolutely TERRIFYING chemistry I’ve seen you do so far… This is Styropyro territory, but with Fluorine
@Nollie_Fullcab
Жыл бұрын
I love seeing videos like this from you Cody. I can feel your genuine curiosity about this experiment and it feels like you did this work to figure something out for yourself as opposed to for your audience. If you ever find yourself thinking "im the only one that would ever watch this", when conceptualizing a video, please dont shelve it. Thats exactly ankles the kind of stuff we love from codyslab. Thank you for being you.
@teeanahera8949
7 ай бұрын
What does “That’s exactly ankles the kind of…” mean?
@Grandwigg
Жыл бұрын
Loved this video. The sharpening was not what I expected. Very fascinating.
@KainYusanagi
Жыл бұрын
Same here! It must be due to the specific way that obsidian forms and its specific composition, where it shears to the monomolecular level and tends to knap in thin sheets, because I expected the thinnest part to dissolve faster than the flat of it, but it didn't!
@nickywilkinson1212
Жыл бұрын
I have a feeling we are watching the training videos of a super villain. Step 1: extract all the precious metals Step 2: disolve the 'hero' in acid Step 3: escape to Mars and live peacefully
@Blutwind
Жыл бұрын
Nah Cody is one of the good guy chemnist. There are others way more scary (though also good guys... hopefully... *looks at NileRed and Explosions&Fire)
@psychogamer1368
Жыл бұрын
You and NileRed were the people who made me have interest in Chemistry in high school... Thanks for the videos...
@wcomalley
Жыл бұрын
As a flint knapper this is interesting to me. One of the most arduous parts of replicating certain blade types like danish daggers is that they have to be ground to a perfect convexity. Perhaps this could greatly expedite the process!
@unvergebeneid
Жыл бұрын
But if you're doing it with modern methods, mightn't you directly use modern materials?
@wcomalley
Жыл бұрын
@@unvergebeneid Who knows how long people having been using acid to shape stone? Maybe this could explain some of the incredible stone work of the ancient egyptians like those hollow vases? Still no good theories on how those were made.
@frysebox1
Жыл бұрын
Choose another acid than this if you can, corrosive+contact poison+deadly vapours+rapidly skin penetrative isn't a great combination.
@wcomalley
Жыл бұрын
@@frysebox1 Yeah I'm a bit scared of hydroflauric acid ever since watching breaking bad haha. I wonder how effective milder acids would be. Would lye do anything to a rock? It's easy to make with campfire ash. Dannish daggers were ground on a granite slab with water... i wonder if using lye water instead would speed things up at all. Regular water takes like 20-30hrs of grinding.
@jacogomez1093
Жыл бұрын
@@wcomalley HF (with a pKa of +3.2, the less the more acidic) is by no means a very strong acid, it just has the strange characteristic of dissolving silica-based materials like glass. sulfuric (pKa of -2), hydrochloric (pKa of -7), or nitric (pKa of 'i don't remember') are stronger acids than HF, that is because fluorine is so reactive that it bonds hydrogen a little to strongly. Also, HF is very, very toxic, it reacts with calcium ions and causes cardiogenic shock and cardiac arrest if it comes into contact with the skin, It's so bad that pretty much every professional chemist I know avoids as much as humanly possible..
@aRandomFish1
Жыл бұрын
I really appreciate the uploads Cody! I don't care what you upload, it's always interesting and I'll always enjoy!
@DannyDeVitois79
Жыл бұрын
Dang, you should have written the date on that arrowhead… Although it’ll probably be just an arbitrary number when someone discovers it in an asteroid 12 billion years from now, long after the earth has been annihilated
@RobbieBeswick
Жыл бұрын
this acid can dissolve so many things but when it comes to plastic it's like 'uh i don't know what to do' i find that so funny
@OmniversalInsect
Жыл бұрын
I thought that part of breaking bad was fake but apparently not
@VincentGroenewold
Жыл бұрын
@@OmniversalInsect Nope, many weird solutions are stored in plastic. I was always kinda amazed by that working with them.
@barszczykczerwony176
Жыл бұрын
Hcl is the big boomer of acids Ain't gonna react with those new 'plastics'
@w0ttheh3ll
Жыл бұрын
@@OmniversalInsect the fake part is that they have huge jars of this extremely dangerous stuff just sitting in a high school lab's storage room.
@among-us-99999
Жыл бұрын
acetone, ether and chloroform can dissolve/attack many plastics, but do nothing to most inorganic materials
@jamesmnguyen
Жыл бұрын
I would love to see a microscopic view of the edges before and after. Maybe even an atomic view if possible.
@x9x9x9x9x9
Жыл бұрын
I find these stone videos way more interesting than I thought I would. I have always wondered about rose rock. Its a weird stone.
@TheRogueRockhound
Жыл бұрын
Rocks can be addictive ^^
@scrotiemcboogerballs1981
Жыл бұрын
My heart sank a little until you said they wasn’t true Indian arrowheads lol but your friend did a great job making those I found a few real ones here in Indiana close to my house I found one little white one I think it’s a bird point used by Indians for hunting birds very cool I used to love going arrowhead hunting thanks for sharing Cody love watching the videos
@Grandwigg
Жыл бұрын
The guys over at good and basic have some great content. Primate forging, the spinning wheels and whatnot, too. (The philosophical discussions are interesting as well). Glad to see the interactions between channels like this.
@fairweathertrains3029
Жыл бұрын
@@Grandwigg wow I never knew one could forge primates! Crazy! (I am just having a little joke) That’s all really cool though sounds like their channel is right up my alley thanks mate
@uapnz0698
Жыл бұрын
That's so cool. I'd love to find one
@unvergebeneid
Жыл бұрын
My heart sank even more because being the eurocentric prick that I am, I thought these might be neolithic! I somehow didn't put together that in the US, authentic stone arrow heads must be much more common and only a couple centuries old.
@0neIntangible
Жыл бұрын
Imagine if they had access to and could have worked with HF acid for sharpening their hunting arrow tips... lol... I found a few when I was a kid visiting my grandfathers farm in Burlington, Ontario... that was neat for a kid to find.
@G53X0Y0Z0
Жыл бұрын
Very cool experiment and demonstration. I think the "snowflakes" in the obsidian may be volcanic ash that fell in the molten obsidian flow. Even though the materials of obsidian, agate, and flint/chert are especially suitable for knapping stone tools because of their characteristic conchoidal fracture, they are formed differently. Many people probably do not know this regarding stone tools, but for a razor sharp cutting blade our ancestors used blades similar to the un-knapped piece that sliced the paper best. Even though knapping could thin and nicely shape arrow heads and other tools, it's more difficult to get a continuous sharp edge that way.
@scottthomas6202
Жыл бұрын
Two jobs ago, hydrofluoric acid was used to write on and etch glass for a college theatrical department. This was sort of a " Safety is Job 42" process. In junior high school art class ( 1976), we chipped out arrowheads from beer bottle glass....that probably wouldn't be allowed now...
@jonasdaverio9369
Жыл бұрын
Something similar to what happened to the obsedian: we can do directional etching with KOH on silicon. Some planes of the crystal are more prone to dissolve than other, and some specific structures can be achieved through this.
@jackd42o
Жыл бұрын
When you said the arrowheads aren't antiques it made me wonder how rare they are 'in the wild' in modern times. Always appreciate your videos and hope you're well. Thanks Cody.
@Camroc37
Жыл бұрын
Some places will have more than others, but they're hardly as common as rocks. There are a lot of time periods as well and some are much more rare. Some designs are also harder to find because they're more fragile than others. Edit: in this video he used ones knapped by machine in modern times.
@dizzy_derps
Жыл бұрын
My grandmother lived on a farm in Mississippi growing up in the 30's and 40's. Over the decades she collected hundreds of arrowheads. They had a beautiful display made for them. It was a wooden coffee table with a glass top. Under the glass was a felt lined drawer and they had them all very neatly displayed. Thinking back on it I don't know whatever happened to those arrowheads. Both my grandparents are dead now but I suspect they just left them behind when their house was destroyed by Katrina.
@jonored
Жыл бұрын
@@Camroc37 Looks like not knapped by a machine, but knapped manually by a friend who presumedly didn't mind the experiment.
@FossilF
Жыл бұрын
Cody, i have a weird thing i want to see done. Silicon metal when amorphous apprently breaks like glass, thus it should be able to be “knapped” into an arrowhead. I have experience knapping but havent been able to get a large enough piece of silicon to test it. Do you think it can be done?
@marclabelle4253
Жыл бұрын
based on my experience with amorphous Si, I would expect that you should be able to.
@lajoswinkler
Жыл бұрын
Silicon is not a metal. Even if it was, it's unnecessary to mention it's a metal.
@ChemEDan
Жыл бұрын
@@lajoswinkler You may not be a metal but you sure are dense
@KainYusanagi
Жыл бұрын
@@lajoswinkler Due to the wide variety of forms in which silicon comes in, due to various alloys and other compounds, noting it as "silicon metal" is, indeed, useful. Furthermore, while it is not in fact a metal by scientific classification, it IS a metalloid, and is used in many aspects of metalworking industries as a metal, where it is referred to as "silicon metal" for that specificity, eg. in Silumin, the silicon/aluminum alloy group; in Ferrosilicon, the iron-silicon alloy group; Nicrosil and Nisil, nickle-silicon alloys (name differentiation is for positive/negative thermocouple legs, respectively); and more. Fun fact: While it has many properties similar to metals, the reason the name of the element in modern day (going back a hundred years to its official naming) is "silicon" rather than the original "silicium", is because it is elementally closer to carbon and boron than to calcium and magnesium.
@Mp57navy
Жыл бұрын
@@lajoswinkler Every element on the periodic table after hydrogen is a metal.
@isaiahpetersen
Жыл бұрын
So glad you are still uploading. Been a long time fan. Can't wait for more!
@-41337
Жыл бұрын
Absolutely love a counterintuitive result, the most valuable kind! I really thought they would get duller as the edges with greater surface area would be dissolved more. But that's not what happened...
@Mallchad
Жыл бұрын
I think that is what happens, as you erode greater surface area it coverges on edges as the surface availible to dissolve gets smaller, which would make it dissolve more *away* from the edge. Essentially chemically sharpening the edge.
@SuperAdnan117
Жыл бұрын
Something of note, while the hand-sharpened arrowheads weren't as sharp as the acid-dipped ones, if used for hunting game, they would "stick" better to flesh and fur than the latter if they penetrated causing continuous bleeding, simply because of the jagged and irregular nature of the edge. The acid dipped arrowheads would need more prominent backward facing barbs to achieve the same level of adherance.
@personious_k
Жыл бұрын
It's allways great when Cody brings us knowledge!
@TheRogueRockhound
Жыл бұрын
EDIT: This is awesome because I find a lot of big seam agates that are super hard to clean. Pressure washer wont cut it and Oxalic is too weak to take the rind off. I bet this would work great when diluted for the job. Brilliant sir, great idea! Thanks Cody!
@theCodyReeder
Жыл бұрын
You can buy a 3% HF solution at Walmart. It’s sold as a rust stain remover.
@TheRogueRockhound
Жыл бұрын
@@theCodyReeder You're the man!
@seangunn5791
Жыл бұрын
@@theCodyReeder hey. Man. Make. A. Video. On. (Interstellar. Space. ) And. The. Fermi. Paradox. Rite. Now. Do. That. Video. Now.
@jonathanmcalroy8640
Жыл бұрын
After watching those arrowheads being made, I really needed a knap.
@stamasd8500
Жыл бұрын
The scary part about HF is not that it will burn you, but that it will poison you. It gets absorbed quickly through your skin because it's such a small molecule. And once inside it will react with the calcium in your bloodstream, causing 2 things to happen: 1. it will lower your calcium to dangerous levels, impairing many functions such as muscle contraction - including the heart muscle, myocardium; and 2. the calcium fluoride precipitates in the bloodstream as little crystals, which will clog your kidneys and give you renal failure.
@photoeagle5100
Жыл бұрын
When the video started i immediately thought about the typical "glassware" cody uses and got a little concerned that inflation was hitting pyrex so hard that he couldn't get any then remembered that hydrofluoric dissolves glass lol
@youtube.commentator
Жыл бұрын
Love your uploads Cody, keep at it, we all appreciate them very much
@mrobviuos74
Жыл бұрын
So you have found out how to acid sharpen certain stones! I love it!🤝👍👍
@mikeriddle1462
3 ай бұрын
Your videos sometimes answer questions, I never thought I wanted to know.. cheers bro🍻
@zachaliles
Жыл бұрын
I was a kid at the tail end of the acid and stone washed jeans era. You just acid washed stones, everything comes full circle eventually.
@honthirty_
Жыл бұрын
Really good observational science that does what we would want to. Rock on Cody!
@andresaofelipe
Жыл бұрын
I honestly thought they woul dull in the acid. My reasoning was that the thinner areas, like the edge, would dissolve much faster than the bulk on account of having a bigger ratio between surface area and volume, but apparently I was wrong
@billcypher8563
Жыл бұрын
I think you are actually right! The chalcedony flint and agate both dulled. I think that obsidian might be a special case since it has some interesting patterns and properties.
@andresaofelipe
Жыл бұрын
@@billcypher8563 hmmmm, it's quite possible that obsidian is more chemically resistant along grain boundaries, which coincidentaly is where it usually fractures
@cabbageman
Жыл бұрын
This is what I thought too
@jamiehughes5573
Жыл бұрын
I find in sort of ironic that one of the strongest acids cannot dissolve plastics. Shows you how hard to break down plastic is
@ryansmiley5495
Жыл бұрын
Looks like the most hard-core tea ever.
@mrln247
Жыл бұрын
I like the prank on the archaeologists. Was aware of an old trick for re-sharpening a dull file in sulfuric although never tried it myself.
@almostsapien
Жыл бұрын
Imagine if someone finds that arrowhead in a couple hundred years.
@clairekholin6935
Жыл бұрын
Just putting the edge in the acid would be a cool way to sharpen it, some experiments would be cool
@accountid9681
Жыл бұрын
the foggy effect created on the obsidian is beautiful
@Osirus1972
Жыл бұрын
I am sitting here in an assay lab at a palladium mine watching this video. . I had to resist going to the HF storage and drumming up my own experiments. Very cool stuff you have going here. Cheers!
@TheAlexisaac1000ify
Жыл бұрын
Such a transformation is neat Cody. I like the way the look how they would nature
@TheMilkMan8008
Жыл бұрын
Hey Cody. I was wondering if there was any news on the Mars One program. I haven't watched your channel in a while. I'm glad a video finally got recomended to me again and Its good to see you still making content.
@jester-gq9jq
Жыл бұрын
Awesome video thanks! Cody you are amazing I love your videos, I love your sense of humor. And I extremely respect your morals.
@chrish9516
Жыл бұрын
You have fantastic chopstick skills.
@CaptainKirk01
Жыл бұрын
CODY! My favorite most humble smart guy!!!
@PotatoesAssistant
Жыл бұрын
try melting some obsidian and flint and glass and agate together and maybe you’ll get a cool layered silica material
@fishstix4209
Жыл бұрын
That ending is gonna confuse TF out of some future archeologists when they dig it up if it ever comes to it.
@Dan-vq4pz
Жыл бұрын
I love the strength/weakness aspects of almost all elements... Yeah it'll melt and absolutely destroy this, but it can't touch this. Except ClF3
@Rebar77_real
Жыл бұрын
That's what gave the edge to the Yellowstone area acid pit pre-war surgeons... probably.
@sweetiewolfgirl
Жыл бұрын
I have only watched the intro, and I have seen a really interesting detail already i have to bring up. In the fume hood, the power on the surface around all the beakers, is that baking soda? In case of spills to neutralize the acid? Edit: So is lime. Right idea as to why. Is lime needed specificly because of the strength of the acid or possible reactions?
@HadronWolf
Жыл бұрын
I went the extra step and watched this on acid, groovy.
@VashGames
Жыл бұрын
Imagine seeing your lab report pinned with this arrowhead and a note "You have failed this class"
@nickg5250
Жыл бұрын
This video is pure anxiety! That acid is scary stuff...
@Cinual
Жыл бұрын
Holy crap those are sharp!
@nobody8717
Жыл бұрын
How does the permeation in acid effect the ability to further work the piece? Or maybe work the piece, then paint a certain amount of acid on the edges for a crisper clean.
@user-yb5cn3np5q
Жыл бұрын
How do we know HF is scary? Cody actually wears protection.
@AntBangBang
Жыл бұрын
Great video Cody. Really interesting.
@flintguy
Жыл бұрын
Being a flintknapper, I will say that this is one way atleast to get rid of that pesky hinge or step fracture, along with all the flaking as well lol.
@caseyneville4587
Жыл бұрын
I LOVE when a notification comes on from Cody! You make such great videos! 😊😊😊
@redred9000
Жыл бұрын
I wonder if this prossess could be used for extremely sharp and reusable scruples for the medical industry, the acid would eat away the dull obsidian, as well as blood and any flesh, (maybe making it sterile in the process) and it would be repeatable until the obsidian got too small for any use. Although I have no idea if this is safe or even practical for the medical field
@personious_k
6 ай бұрын
Love all your videos man! Wonder eho will find your arrowhead in the future?
@lucasvlox
Жыл бұрын
I love how u pour the water in acid and you are probably doing this on purpose :D The video about this topic was the reason for me to follow ur content 6, 7, 8, 9 (???) years ago. Still one of the best, much love.
@rekire___
Жыл бұрын
But can you dissolve hydrofluoric acid in arrowheads?
@patrickmihajlovic4112
Жыл бұрын
An EXTRAORDINARY vid which was entertaining AND informing me ! NOTHING more i could ask for.... THX++ Cody !
@chmellen
Жыл бұрын
I think that method is the same as sharpening a file. Machinists have used acid for years.
@robynevans157
Жыл бұрын
4:50-4:55 is when he finally loses his sanity.
@nazamroth8427
Жыл бұрын
I first read hydrochloric acid, and went "eh, limestone arrowheads, I suppose."
@GeigerCheck
Жыл бұрын
I was wondering if you could recover any important minerals from a used water filter?
@jansenart0
Жыл бұрын
15:15 Show this section to your geologist friends to distract them while you wind up and aim with your wooden cudgel.
@ThePerks2010
Жыл бұрын
I wonder if Cody ever had to have "the talk" with his parents? Mum - "Son, are you a domestic terrorist or just a mad scientist? We'll accept you either way but you might need help"
@Broockle
Жыл бұрын
I would have thought they'd get more blunt because the acute angles have more surface area than a dull edge. Kinda like a ball of dragoons completely surrounded by zerglings.
@danielfryar677
Жыл бұрын
Thanks for being nice when I ran into you at the store lol. I appreciate what you do
@Natetherocksmith
Жыл бұрын
I wonder if it would be possible to use acid to make a sword or something. Like selectively eroding parts away of metal or something similar
@toreedr
Жыл бұрын
4:50 I think this guy just snapped into the evil mad scientist everyone was expecting him to become.
@av8rdoug824
Жыл бұрын
Heres my hunch... obsidian and agate are both high in silica which the acid should easily dissolve. However, obsidian being felsic but crystalized (also high in mineral content, feldspar, etc), it makes the reaction much slower. The agate being chalcedony (not crystalized) the acid reacts much easier.
@matthewellisor5835
Жыл бұрын
Very interesting seeing the difference between those samples; From very far away. HF scares me as much as concentrated HOOH or TATP in larger measures than for which milligrams are convenient
@RuneChaosMarine
10 ай бұрын
@4:52 like 'who framed rodger rabbit' and the 'dip' to melt cartoons. and the big rubber gloves.
@polytrichum1119
Жыл бұрын
Hello!I havent watched this video yet,but your videos inspired me to get into chemistry!I really thank you for that!
@Smallathe
Жыл бұрын
A very cool experiment!!!
@alejandrostrass2559
Жыл бұрын
Am I the only one who always reads "cody slab"? 😂
@bentationfunkiloglio
Жыл бұрын
Interesting! I wonder if one could use this acid to dissolve quartz revealing any precious metal inclusions.
@txjigen8
Жыл бұрын
Cody drowning rocks killed me lmfao
@INT41O
Жыл бұрын
Glass, metal, ceramics, flesh: Cillit Bang! Cleans up the lot.
@satoau1
Жыл бұрын
well that was even more interesting than i expected. great science!
@Sh4quille0atmeal
Жыл бұрын
Breaking Bad taught me to not fill a bathtub with it
@noob19087
Жыл бұрын
Would a mixture of a weak acid, say citric, and a fluorine salt be able to dissolve these?
@smellycat249
Жыл бұрын
I wonder if the combination of the carbon/silicon lattice of the obsidian arrowhead, combined with the fracture mode of the lattice, allowed for a carbon edge that is hard for the acid to attack.
@NatureNatesVivarium
Жыл бұрын
were those crystals on the obsidian arrowhead actually minerals that were left behind by the dissolving obsidian?
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