Why does foam form when baking soda and vinegar are mixed?
Answer and explanation
Correct answer: Due to formation of carbon dioxide gas
Baking soda is sodium hydrogen carbonate, while vinegar contains acetic acid. When they react, the acid first forms carbonic acid, which quickly decomposes into carbon dioxide, water, and a salt: NaHCO₃ + acid → CO₂ + H₂O + salt. The escaping CO₂ bubbles become trapped in the liquid and produce foam. No hydrogen metal, frozen oxygen, or burning sodium chloride is involved.
Frequently asked questions
What is the correct answer to this question?
Due to formation of carbon dioxide gas
Why is this the correct answer?
Baking soda is sodium hydrogen carbonate, while vinegar contains acetic acid. When they react, the acid first forms carbonic acid, which quickly decomposes into carbon dioxide, water, and a salt: NaHCO₃ + acid → CO₂ + H₂O + salt. The escaping CO₂ bubbles become trapped in the liquid and produce foam. No hydrogen metal, frozen oxygen, or burning sodium chloride is involved.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
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