What makes fizzy drinks taste fizzy? When carbon dioxide gas and water react, they produce a weak acid, called carbonic acid. Carbonic acid is what is in your soda or any drink with bubbles. Carbonic acid stimulates the same taste receptors as the ones that are triggered by cinnamon and mustard and it is what gives rise to that prickly sensation in your mouth. If you have ever heard your dentist mention to you that it is the soda that you drink that is ruining the enamel on your teeth, take comfort in the fact that it is not carbonic acid that is the culprit. Hint: It is Red Bull that is the worst offender. Carbonic acid has a pH of 4.2, giving carbonated water a pH of 4.5. This is slightly acidic, but certainly not as acidic as Red Bull, which is 3.3. Where can you find carbonic acid? The first place you can find it, is in you! Carbon dioxide is present in the blood and combines with water to form carbonic acid, which is exhaled as a gas by the lungs. The rate of your respirat
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