Question

Write the chemical name of Na2C03.10H20 and Na2CO3. Write the
significance of 10H20. Mention the term used for water molecules attached with a salt. With the help of a chemical equation, explain the method of preparation of both Na2 CO3.10H20 and Na2co3. Also list two
- uses of of Na2C03.10H2O.​

Answer 1

Answer:

Sodium bicarbonate.

10H2O signifies the water molecules attached to the atom(per unit salt)

it is called the water of crystallization.

Na2CO3 + 10H2O   re-crystallization _> Na2CO3.10H2O

2NaHCO3 heat>  Na2CO3 + H2O + CO2

1] Used in textile industry.

2] Used to remove permanent hardness of water.

                 MARK BRAINLIEST I AM VERY CLOSE TO NEXT RANK...

Answer 2

The chemical name of -

• $\sf{Na_2CO_3.10H_2O}$ is Sodium carbonate decahydrate.

• $\sf{Na_2CO_3}$ is Anhydrous sodium carbonate.

Significance of $\sf{10H_2O}$ -

When 10 molecules of water attached to salt then it is known as Water of Crystallisation and is responsible for the change in colour and shape of the crystals.

Preparation of $\sf{Na_2CO_3.10H_2O}$ and $\sf{Na_2CO_3}$ -

$\sf{NaCl+H_2O+CO_2+NH_3\rightarrow NH_4Cl+NaHCO_3}$

Here, NaCl is Sodium chloride, H2O is Water, CO2 is Carbon dioxide, NH3 is Ammonia, NH4Cl is Ammonium chloride and NaHCO3 is Sodium hydrogen carbonate.

$\sf{2NaHCO_3 \xrightarrow{heat}Na_2CO_3+H_2O+CO_2}$

NaHCO3 is Sodium hydrogen carbonate, H2O is Water, CO2 is Carbon dioxide and Na2CO3 is Sodium carbonate.

$\sf{Na_2CO_3+10H_2O\rightarrow Na_2CO_3.10H_2O}$

Here, Na2CO3 is Anhydrous sodium carbonate, H2O is Water and Na2CO3.10H2O is Sodium carbonate decahydrate.

Two uses of $\sf{Na_2CO_3.10H_2O}$ -

1) Used to remove the permanent hardness of the water.

2) Used in paper, glass and soap industries.