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no i did the experiment. the pop rocks just float to the top and the mentos fizz up the soda depending on the type of soda

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11y ago
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13y ago

Basically we are witnessing the surface effect. The carbon dioxide is forming bubbles at a rapid rate. When the bubbles get to the top of the bottle have nowhere else to go but up so they fly. This happens because the caffeine, potassium benzoate, Aspartame, and CO2 gas contained in the, Sprite and the Gelatin and gum Arabic ingredients of the Mentos would have a reaction toward each other. And the surface of the Mentos is littered with many small holes, allowing CO2 bubbles to form very rapidly. Mentos are also fairly dense and sink rapidly, quickly creating bubbles that seed further bubbles as they rise. Crushed Mentos were less effective.

The physical structure of the Mentos is the most significant cause of the eruption due to nucleation. When flavored Mentos with a smooth waxy coating were tested in carbonated water, no reaction occurred, whereas standard Mentos added to carbonated water formed a small eruption, affirming the nucleation-site theory. The surface of the mint Mentos is littered with many small holes, allowing CO2 bubbles to form very rapidly and in great quantity, in turn causing the jet of foam. This was further supported when rock salt was used as an effective substitute for Mentos.

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Q: What causes soda to explode when a mento is put into it?
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