Multiple choice What happens when sodium carbonate is recrystallised from its aqueous solution? Remains the same Changes to sodium bicarbonate Changes to sodium carbonate decahydrate Changes to anhydrous sodium carbonate Reveal answer Fill a bubble to check yourself C Correct answer Explanation When sodium carbonate is recrystallised from its aqueous solution it changes to sodium carbonate decahydrate (Na2CO3. 10H2O)