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now thats pure entertainment.
Moving the solution gently or exposing it to air does not trigger the reaction because it does not introduce a nucleation point (a foreign particle large enough to attract/form ice crystals). This is how the demonstrator is able to pour the solution into the tray without triggering the reaction. If he poured much faster or if there were a large dust particle in the tray, the reaction would have occurred immediately on contact.
Do you know what the term "supercooled" means? Do you understand that not all liquids freeze at temperatures you would consider "cold"? The reason this sodium acetate solution freezes so rapidly is because it`s ALREADY below it`s freezing point and simply needs to be agitated or have some foreign particle introduced to begin the chain reaction of ice crystal formation. That is what the term "supercooled" means. By definition. Why do you think it freezes when he touches it? Because his finger is really cold? No, because the freezing point of the solution has already been reached. We`re not talking about rocket science here, people. All you have to do is Google "supercooled" to understand. You know how to Google, right?
@Andy1821: "hehe, anyone remember people writing in caps about how it was "supercooled"? :P"
Umm, what are you two talking about? It IS supercooled. I mean, I hate to be negative, but try to understand what a word means before posting snarky comments about it, okay?
Uhh, yes. Heat LEAVES the reaction, hence entering the surroundings. Thus, "it gets hot" (as in you will feel heat if you touch it or the container in which it is taking place).
So how was the video wrong, exactly?
I love it, faved right away!
They were wrong in the video. In exothermic reactions, heat LEAVES hence the exo part of exothermic.
TO get to 8 percent here is an easy way if you have some kind of knolwedge of chemistry
here is the math formula for it for easy computation
so for M1 you would put 5 percent Volume 1 you put whatever volume you think is good for you. Molarity 2 you put 8 percent Volume 2 you put an X because you are solving for it.
Use math to find out how much volume must evoporate to get an 8 percent solution. Ask if you need help.
It IS supercooled. The melting point of sodium acetate is 58 °C. Since room temperature is roughly 23 °C, it should be a solid, but it remains in its liquid form.
thank god for scientific maturity?
Sodium Acetate NaC2H3O2 is a component of the fizz made when you mix baking soda and vinegar together.
i am going to try now
This stuff is awesome, the sodium acetate-online-shops will be sold out for weeks after this video conquers the web, heheh :D
Very cool, but simple chemistry.
MUSIC`S BLISS BTW ANYBODY KNOW WHATITIS?
Either way, this is awesome! I wanna try this and see how many people think I`m a witch...:-)
would it freeze if you poured it
I can`t wait to try it =]
84 grams of sodium bicarbonate react with 750 g of 8% vinegar to make 82 g sodium acetate in water. By subsequently boiling off most of the water, one can refine either a concentrated solution of sodium acetate or actual crystals.
The product is not completly solid like ice. You can compress it and it has a consistency simiular to frost or snow that has been compacted.