Question

a chemical compound is used for removing permanent hardness of water. it is obtained from baking soda. identify the compound . state its chemical name and formula. write chemical equation involved in the preparation from baking soda

Answer 1

washing soda
Na2CO3.10H2O
sodium carbonate decahydrate
2 (NaHCO3) → (on heating) Na2CO3 + CO2 + H2O
Na2CO3 + 10H2O → Na2CO3.10H2O 

Answer 2

A chemical compound is used for removing permanent hardness of water. it is obtained from baking soda. identify the compound . state its chemical name and formula. .The chemical equation involved in the preparation from baking soda.

Explanation:

The chemical compound is washing soda in anhydrous form : Na₂CO₃.

Its chemical name is : sodium carbonate decahydrate in hydrated form and in anhydrous form it is : Sodium carbonate .

Preparation

Baking soda can be prepared by solvay's process (an efficient process ) that is given below :

NaCl + NH₃ + CO₂ + H₂O--> NaHCO₃            +             NH₄Cl

sodium chloride                   sodium bicarbonate   ammonium chloride

This is baking soda .

Uses of baking soda

It is used as an anta-acid

It is used in making soda acid type fire extingusher .

It is used in baking