Multiple choice

Soda ash is

  1. Na2HCO3

  2. Na2CO3. H2O

  3. NaOH

  4. Na2CO3

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Soda ash is the common name for anhydrous sodium carbonate, Na2CO3. Option A is baking soda (sodium bicarbonate), option B is washing crystals (hydrated sodium carbonate), and option C is caustic soda (sodium hydroxide).