As I deal with pyrotechnics and chemistry in general for a long time, I inform everyone:
- we write
carbide - carbide is calcium acetylide with the formula CaC2
- its smell is mainly due to the content of calcium phosphide, which forms highly toxic phosphine with water
- carbide, after adding water, hydrolyzes according to the equation:
CaC2 + 2H2O -> Ca(OH)2 + C2H2
This reaction is exothermic, meaning it gives off heat. Calcium hydroxide (slaked lime) and ethyne (acetylene) are formed.
Now let's deal with the highlight of the show, acetylene.
- with a content of 2.4% - 83% vol. forms an explosive mixture in the air
- it is lighter than air
- in the air it burns with a sooty flame, when mixed with air or oxygen it explodes
- above 0.2 MPa (about 2 atmospheres) detonates without air, decomposing to primary factors, therefore it is stored in the form of a solution in acetone
But how do we play it? I immediately say that you can lose your hearing, eyesight, a few fingers or a hand, and if we have no moderation and exaggerate with dimensions, you can even lose your life. That's why I don't recommend this game. Well, the whole idea is to put a small lump of carbide in a liter paint can with a small hole in the bottom. Then a little water is added, the lid is closed and directed in a remote direction. Then we place ourselves perpendicularly to the axis of the box lying on the polygon. It is best to have earplugs in the ears and protective glasses that will provide the appearance of safety. Then I do not recommend putting a lit match to the hole in the bottom, but if you want to... The mixture of acetylene with air will explode violently, creating an unbearably loud bang and throwing the lid several meters away, and the can a little less. Depending on the proportions, it can also shred the can, and the can will us, if we don't have to be satisfied with "earning" a piece of sheet metal on the head.
To those who want to try KMnO4 with different substances - warning! Most of the mixes on this are pyrophoric when combined with water. Especially sugar, it acts almost like permanganate with glycerin. It's the same with metals, only there's no smoke and then fire, but first the flash that will make a roast chicken out of any man, then the smoke ;)
If you want to know where to buy various things like fuses or reagents, I can recommend a few sellers, but I don't know if I can advertise them here, so let's say this is my friend's website from another forum:
link .
@fymon123 You can see the effects of being hit in the head with a can in your youth. Unspelling, ungrammatical, incomprehensible. Don't play with it or you'll hurt yourself even more. Yes, it's the same carbide that you scare moles with and you can buy it at a garden store, construction chemicals, reagent stores, cool friends from another forum, and how much it costs depends on the seller. I told you to satisfy curiosity, not to help natural selection, win a Darwin award, or otherwise kill yourself.
I used to complain that the mower had little power to mow the grass, it went out, choked. So I decided to put a few pieces of carbide in the gas tank as a nitrating agent 
