Question

Name the compound which is obtained from baking soda is used to remove permanent hardness of water .write its chemical formulae .what will happen when it is recrystillised from its aqueous solution

Answer 1

the compound is washing soda. Its chemical formulae is Na2CO3.10H2O . ANHYDROUS SODIUM CARBONATE becomes hydrated when it is recrystallized. 

Answer 2

• Washing soda is the compound used to remove hardness of water.
• $Na_{2}CO_{3}$ or Sodium carbonate
• ANHYDROUS SODIUM CARBONATE becomes hydrated.

EXPLANATION:

Washing soda is the compound which is helpful to get rid of all kinds of stubborn stains from clothes and it also treat well to take away hard water spots. It is a carbonic acid salt and it is different from baking soda. Sodium carbonate is dangerous when we practiced in an amiss direction.