How come when you burp while drinking soda and exhale the air through your nose, it stings?
In: Biology
The fizz in carbonated drinks comes from carbon dioxide dissolved in the drink. When it hits your stomach some of the carbon dioxide gas comes out of the drink and when you pass it through your nose it redissolves in the water and mucus in your nasal passage. Carbon dioxide is an acidic oxide and forms carbonic (a weak) acid when dissolved in water which is what stings a bit.
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