When Mentos is added to Coca-Cola, why does Coca-Cola turn frothy?

When mentos is added to the Coca-cola a large eruption is seen, this is because, In the Coca-cola bottle, the Mentos candy provides a rough surface that allows the bonds between the carbon dioxide gas and water to break more easily, helping to create carbon dioxide bubbles.

As the Mentos candy are dense, they sink in the bottle, the candy causes the production of more and more carbon dioxide bubbles, and the rising bubbles react with carbon dioxide that is still dissolved in the soda to cause more carbon dioxide to be freed and create more bubbles, which results in the eruption.


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