Lemon juice is so sour it makes you pucker up! Why? It's an acid. When something has a sour taste, it contains acid. The word "acid" comes from "acidus," the Latin word for sour or tart.
Your stomach contains gastric acid to break down (digest) food. Not to gross you out, but that's why it tastes sour and yucky when you throw up. You're tasting some of the stomach acid.
If something's acidic, it will produce carbon dioxide bubbles when combined with baking soda. Carbon dioxide is the same gas you breathe out when you exhale.
Is sour candy acidic? Let's find out!
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© Loralee Leavitt. Used with permission.
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Reviewed by: Mary L. Gavin, MD
Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor.