Question 48
MediumOriginal questionWhat is the chemical formula of baking soda?
Show the answer and explanation
CorrectNot quiteAnswer B
Correct answer: B
Explanation
Baking soda is sodium hydrogen carbonate, written NaHCO₃.
NaCl is common salt and CaCO₃ is limestone or marble.
Na₂CO₃ is sodium carbonate, which is washing soda — a different substance with a similar name and a similar-looking formula.
Worth noting
Washing soda and baking soda are the pair most often swapped. The hydrogen in NaHCO₃ is the difference, and it is why baking soda releases carbon dioxide when heated.
- Concept
- Formulae of common household chemicals
- Typical timeTypical
- 45 s
- Your timeYours
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