A Cross Section of a Mad-Dawg Gumball Shows an Outer

question 70

Multiple Choice

A cross section of a Mad-Dawg gumball shows an outer layer of citric acid and malonic acid, beneath that a layer of food coloring, sugar, and flavoring, beneath that a layer of sodium bicarbonate (NaHCO₃) , and finally in the middle-gum! A 12-year-old puts one in his mouth and immediately puckers, smiles, and then foams at the mouth before chewing. Where did the foam come from?

• A) Twelve-year-olds naturally foam at the mouth.
• B) The sodium bicarbonate explodes when exposed to moisture.
• C) The acids react with the sodium bicarbonate, making unstable carbonic acid.
• D) The foam must have been packed in the gum somewhere.
• E) The acids react with the sugar making carbon volcano.

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