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Home » Class 10 » Acid Bases and Salts » Washing soda

Washing soda

July 21, 2016 By Mrs Shilpi Nagpal 2 Comments

Question 1 What is the chemical name and formula of washing soda?
Question 2 What is soda ash?
Question 3 Name a metal compound which has detergent properties?
Question 4 Name a sodium compound used for making borax and glass?
Question 5 Explain the preparation of washing soda by solvay’s process?
question 6 Give uses of washing soda?
Question 7 Give few properties of washing soda?
Washing Soda
Washing soda is sodium carbonate containing 10 molecules of water of crystallisation.It is called as sodium carbonate decahydrate.
The formula of washing soda is
 Sodium carbonate which does not contain any water of crystallisation is called anhydrous sodium carbonate or soda ash.The formula is Na2CO3
 
Preparation
 
It is prepared by Solvay’s process.
 
1)A cold and concentrated solution of sodium chloride is reacted with ammonia and carbon dioxide to obtain sodium hydrogen carbonate.
 
2)Sodium hydrogen carbonate is separated by filtration,dried and heated.Oh heating sodium hydrogen carbonate decomposes to form sodium carbonate.
 
3)Anhydrous sodium carbonate is dissolved in water and recrystallised to get washing soda crystals containing 10 molecules of water of crystallisation.
 
Properties
1)It is a white transparent crystalline solid.
 
2)It is soluble in water.
 
3)The solution of washing soda in water is alkaline which turns red litmus to blue.
 
4)It has cleansing properties.
 
Uses
1)It is used to remove permanent hardness of water.
 
2)It is used in the manufacture of glass,soap,paper.
 
3)It is used for washing clothes.
 
4)It is used in the manufacture of borax.

Filed Under: Acid Bases and Salts, Class 10 Tagged With: properties of washing soda, soda ash, sodium carbonate decahydrate, solvay's process, uses of washing soda, washing soda

About Mrs Shilpi Nagpal

Author of this website, Mrs Shilpi Nagpal is MSc (Hons, Chemistry) and BSc (Hons, Chemistry) from Delhi University, B.Ed (I. P. University) and has many years of experience in teaching. She has started this educational website with the mindset of spreading Free Education to everyone.

Reader Interactions

Comments

  1. Prince says

    December 7, 2018 at 9:41 pm

    Good

    Reply
  2. Swarnam says

    March 11, 2019 at 9:20 pm

    Nice answer

    Reply

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