Preparation of washing soda class 10

You must have read Chapter 2  Acids, Bases, and Salts as a class 10 student. We have already discussed the preparation of baking soda in the chapter.

Today, we'll go into  depth about the preparation of washing soda

 

     

 Preparation of washing soda 

        Table of content

1.    Chemical   formula of Washing soda

2.    Chemical name of washing soda

3.    Physical Properties of Washing Soda

4.    Preparation methods

5.   Chemical properties of washing soda

6.    Uses of washing soda

7.    FAQs

 Chemical formula of washing soda

`Na_2CO_3. 10H_2O`

There are 10 molecules of crystalline water with one molecule of sodium carbonate.

Chemical Name of Washing Soda

Sodium carbonate

Physical Properties of Washing Soda

    1.  It is a transparent crystalline solid

    2.  Soluble in water

    3.  Its solution in water is alkaline.

    4.  It losses water on heating.

 

Preparation method

 

Washing soda can be prepared by heating sodium hydrogen carbonate (Baking soda).

`NaHCO_3 \overset{heat}{\rightarrow}Na_2CO_3 +H_2O + CO_2`

On re-crystallization of sodium carbonate, we get washing soda.

`Na_2CO_3 + 10H_2O→ Na_2CO_3. 10H_2O`

 

Chemical Properties of Washing Soda

   1.  On heating, washing soda losses 9 molecules of water, and monohydrate is formed. This process is known as ‘efflorescence’

 `Na_2CO_3. 10H_2O \overset{373k}{\rightarrow} Na_2CO_3. H_2O + 9H_2O` 

  2.  When the monohydrate of washing soda is heated above 373K, it losses water molecule completely and form a white powder called soda ash.

 `Na _2CO_3. H_2O \overset{above    373K}{\rightarrow} Na_2CO_3 + H_2O`

Uses of Washing Soda

   1.  It is used as a cleansing agent for domestic purposes.

   2.  It is used in softening hard water.

   3.  In the manufacturing of other sodium compounds like sodium silicates, sodium hydroxide, etc.

   4.  In the manufacturing of paper, soap, and detergents.

 

FAQs

   1.  Why is the preparation of washing soda called the ammonia soda process?

Ans – Ammonia is an essential component in making washing soda from sodium chloride, that’s why it is called the ammonia soda process.

   2.  What is the chemical formula of washing soda?

Ans- The chemical formula of washing soda is `Na_2CO_3.10H_2O`

   3.  What is the chemical name of washing soda?

Ans - The chemical name of washing soda is Sodium Carbonate.

   4.  What is washing soda?

Ans – Washing soda is sodium carbonate with 10 water molecules.

   5.  Washing soda Kiska prachalit naam hai?

Ans- Sodium carbonate `Na_2CO_3`

    6.  What is the `P^H` of washing soda?

Ans – Washing soda is alkaline in nature so its `P^H` value is above 7 (approx. 11).

   7.        Tell if washing soda is acidic or basic.

   Ans- Washing soda is basic in nature.

   8.  What is the number of molecules of water of crystallization in washing soda?

  Ans  - The number of molecules of water of crystallization in washing soda is 10.

   9.  Name the metal whose carbonate is known as washing soda

Ans-  Sodium (Na)

   10.    Is washing soda an acid or base?

Ans – Washing soda is a base.

Related Topics

1. Preparation of Sodium hydroxide

2. What is `P^H`?

3. Preparation of Bleaching Powder