Question

A chemical compound X is used in glass and soap industry.
Identify the compound and give its Chemical formula.
How many molecules of water of crystallization are present in compound X.
How will you prepare the above compound starting from sodium chloride.
Give all relevant Equations involved in the process.

Answer 1

The chemical compound 'X' is identified as Sodium carbonate.

Compound identification and its chemical formula:

• As per the given clue, the chemical compound is identified as Sodium carbonate commonly called washing soda.
• Its chemical formula is $Na_2CO_3$.
• The compound "X" has 10 molecules of water of crystallization. It is called as Sodium carbonate deca hydrate ($Na_2CO_3.10H_2O$).

Equations involved in the preparation of Sodium carbonate deca hydrate from sodium chloride

1. Sodium chloride is treated with ammonia, carbon dioxide and water. It leads to the formation of sodium hydrogen carbonate and ammonium chloride.

$NaCl+NH_3+CO_2+H_2O\rightarrow NaHCO_3+NH_4Cl$

2. From the obtained products only $NaHCO_3$ is separated and is heated. This process yields sodium carbonate along with water and carbon dioxide.

$\mathrm{NaHCO}_{3} \rightarrow \mathrm{Na}_{2} \mathrm{CO}_{3}+\mathrm{H}_{2} \mathrm{O}+\mathrm{CO}_{2}$

3.  The obtained product sodium carbonate is concentrated with the help of water and left for cooling and it yields Sodium carbonate deca hydrate.

$Na_2CO_3+10H_2O\rightarrow Na_2CO_3.10H_2O$

Learn more about such concept

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Answer 2

The chemical compound 'X' is identified as Sodium carbonate