Do mentos work better with coke Diet Coke or pepsi?

The reaction between Mentos and soda is due to the interaction between gelatin and gum arabic in Mentos with the high soda gas content.

Gelatin is a protein derived from collagen, and it is the primary component of the chewy outer shell of Mentos. Gum arabic, on the other hand, is a natural gum obtained from the sap of Acacia trees, and it is used as a binding agent in Mentos.

When Mentos are dropped into soda, the gelatin quickly absorbs the carbon dioxide (CO2) gas present in the soda. This absorption creates tiny bubbles on the surface of the gelatin, which then rapidly grow in size due to the rapid release of CO2 gas from the soda. The bubbles rise to the surface, creating the characteristic eruption of foam.

The reaction between Mentos and soda is most effective with diet sodas, such as Diet Coke or Diet Pepsi, because they have a higher concentration of CO2 gas compared to regular sodas. This is due to the fact that diet sodas are sweetened with artificial sweeteners, which do not require fermentation, unlike sugar used in regular sodas. As a result, diet sodas have a higher carbonation level, which leads to a more dramatic reaction with Mentos.