Multiple choice

Washing soda is the common name for

  1. calcium carbonate

  2. sodium carbonate

  3. calcium bicarbonate

  4. sodium bicarbonate
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Washing soda is the common name for sodium carbonate decahydrate (Na2CO3·10H2O). It's called "washing" soda because it's widely used as a water softener in laundry and cleaning products. Sodium carbonate alone (anhydrous) is soda ash.

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