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You are here: Home / Class 10 / Acid Bases and Salts / Water Of crystallisation

Water Of crystallisation

Last Updated on March 20, 2019 By Mrs Shilpi Nagpal 9 Comments

Question 1 What is meant by water of crystallisation?Give example?
Question 2 What are hydrated salts?
Question 3 What are anhydrous salts?
Question 4 Name a compound which contains two molecules of water of crystallisation?
Question 5 Why copper sulphate is blue in colour?
Water Of crystallisation
The water molecules which form part of the structure of a crystal are called water of crystallisation.
 The salts which contain water of crystallisation are called hydrated salts.
 For Ex:
1)Copper Sulphate crystals contain 5 molecules of water of crystallisation(CuSO4.5H2O)
It is blue in colour.
 
2)Sodium carbonate crystals contains 10 molecules of water of crystallisation(Na2CO3.10H2O)
 
3)Calcium sulphate crystals contains 2 molecules of water of crystallisation(CaSO4.2H20)
 
The water of crystallisation gives the crystals of the salts their shape and colour.
 
When hydrated salts are heated strongly,they lose their water of crystallisation.By losing water of crystallisation,the hydrated salts lose their regular shape and colour,and become colourless powdery substances,
 
The salts which have lost their water of crystallisation are called anhydrous salts.
 
For Ex:Copper sulphate crystals are blue in colour.When copper sulphate crystals are heated strongly,they lose water of crystallisation and form anhydrous copper sulphate which is white in colour.

Filed Under: Acid Bases and Salts, Class 10 Tagged With: anhydrous salts, calcium sulphate, copper sulphate, hydrated salts, sodium carbonate, water of crystallisation

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.

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Comments

  1. saquib khan says

    November 26, 2017 at 12:00 am

    can be accepted by student

    Reply
  2. RAMESH VITHAL THORAT says

    November 6, 2018 at 10:31 pm

    Really helpful as compared to my science textbook.

    Reply
  3. KARAN RAJ says

    February 6, 2019 at 3:34 pm

    GOOD . I AM VERY HAPPY TO SEE YOUR CONTENT. YOUR CONTENT REALLY GOT 5 STARS RATINGS.
    THANKS .

    Reply
  4. P selvi says

    March 11, 2019 at 7:10 am

    Nice..your content is so easy to read and remember… Thanx

    Reply
  5. Santhiya says

    November 1, 2019 at 9:33 pm

    It is very useful thanks a lot for this explanation

    Reply
  6. Aesha says

    May 31, 2020 at 9:28 am

    Really very simple and easy notes of this website.

    Reply
  7. Radha rani says

    August 31, 2020 at 10:03 am

    Awesome

    Reply
    • Radha rani says

      August 31, 2020 at 10:04 am

      Very good explanation

      Reply
  8. Hiro White says

    April 14, 2021 at 8:02 pm

    This is really easy to understand. This really helped me further my knowledge of this topic. Thanks

    Reply

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