Why does carbonated water have a taste?
Chemistry For Your Life
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The Effects of Carbonated Beverages on Taste and Taste
We are not just experiencing bubbles bursting and tasting a little bit of acid on our tongue when we drink fizzy drinks. What's actually happening is there is a CO2 receptor on our tongue that senses the CO2. If you drink carbonated beverages in a pressure chamber where the bubbles cannot burst, you still experience the same fizzy sensation. And our tongues are what's sort of making the acid come about as well.
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