Question 43
EasyOriginal questionWashing soda, used to soften hard water and clean clothes, is
Show the answer and explanation
CorrectNot quiteAnswer D
Correct answer: D
Explanation
Washing soda is hydrated sodium carbonate, Na₂CO₃·10H₂O.
It removes the calcium and magnesium that make water hard.
- Concept
- Washing soda
- Typical timeTypical
- 35 s
- Your timeYours
- —
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