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Diet Coke and Mentos
How do I make a Diet coke and Mentos ROCKET?
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It's a process called "nucleation," in which the particular chemistry of the Mentos candy interacts with the chemistry of the carbonated Diet Coke, causing the carbon dioxide gas, or CO2, to suddenly come out of suspension in the liquid and make a break for freedom.
the issue you have and that person that answered before didn't address, is that you want a ROCKET, not a fountain. In this case you could try two things, one, drop a few mentos in and attempt to screw the lid back on and throw it before it explodes from the extreme pressure of the CO2 separating from the water, or loosly sit it between two adjustable concave plates held up by rods. drop the mentos in screw the lid on and twist the plates so that the bottle neck is pointing downward, i'll work itself out.
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I found this online:
{This activity is probably best done outside in the middle of an abandoned field, or better yet, on a huge lawn.}
1. Carefully open the bottle of soda. Position the bottle on the ground so that it will not tip over.
2. Unwrap the whole roll of Mentos. The goal is to drop all of the Mentos into the bottle of soda at the same time (which is trickier than it looks). One method for doing this is to roll a piece of paper into a tube just big enough to hold the loose Mentos. You'll want to be able to position the tube directly over the mouth of the bottle so that all of the candies drop into the bottle at the same time.
3. Don't drop them into the bottle just yet! Warn the spectators to stand back. Okay, you're going to drop all of the Mentos into the bottle at the same time and then move out of the way quickly.
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