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Home » Class 10 » Acid Bases and Salts » Plaster Of Paris

Plaster Of Paris

July 21, 2016 By Mrs Shilpi Nagpal 15 Comments

Question 1 Write the chemical formula and name of plaster of paris?
 
Question 2 What is gypsum?
 
Question 3 Name the calcium compound which hardens on wetting with water?
 
Question 4 What will happen if heating is not controlled while preparing plaster of paris?
 
Question 5 Name the compound which is used in hospitals for setting fracture bones?
 
Question 6 How is plaster of paris prepared from gypsum?
 
Question 7 Give few uses of plaster of paris?
 
Plaster Of Paris
Plaster of paris is calcium sulphate hemihydrate.
 The chemical formula of Plaster of paris is CaSO4·½H2O
It is known as P.O.P.
 
Preparation
It is prepared from gypsum.
 
Gypsum is calcium sulphate dihydrate. The chemical formula of gypsum is CaSO4·2H2O
 
Plaster of paris is prepared by heating gypsum to a temperature of 373K.When gypsum is heated to a temperature of 373k ,It loses three-Fourths of its water of crystallisation and forms plaster of paris.
 
Properties
1)It is a white powder.
 
2)It has a very remarkable property of setting into a hard mass on wetting with water.
 
P.O.P. should be stored in a moisture proof container.
 
Uses
1)It is used in hospitals for setting fractured bones in the right position to ensure correct healing.
 
2)It is used in making toys,decorative materials,cheap ornaments,cosmetics,black-board and casts for statues.
 
3)It is used in chemistry laboratories for sealing air gaps in apparatus where air-tight arrangement is required.
 
4)It is used for making surfaces smooth before painting.

Filed Under: Acid Bases and Salts, Class 10 Tagged With: gypsum, plaster of paris, properties of plaster of paris, uses of plaster of paris

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. Yasuusakku says

    July 28, 2018 at 10:33 pm

    It is good

    Reply
    • Sanskar singh baghel says

      November 25, 2018 at 6:53 pm

      Very good I like it

      Reply
      • Twinkle says

        March 8, 2019 at 8:42 am

        Awesome

        Reply
  2. Prabhash says

    August 8, 2018 at 5:32 am

    Osm notes

    Reply
  3. Anshika says

    August 28, 2018 at 11:32 pm

    Great work!!

    Reply
  4. Ashi says

    August 28, 2018 at 11:35 pm

    Great work!!

    Reply
  5. Ashi says

    August 28, 2018 at 11:37 pm

    Loved it!!

    Reply
  6. Mehul says

    September 14, 2018 at 12:23 am

    Informative !!!!!!

    Reply
  7. Venugopal says

    October 10, 2018 at 3:56 pm

    Nice notes

    Reply
  8. Sakshi says

    February 15, 2019 at 7:15 pm

    Bhahut ache notes hai

    Reply
  9. Sakshi says

    February 15, 2019 at 7:16 pm

    Nice notes

    Reply
  10. Yogitanjaly mishra says

    March 8, 2019 at 8:51 pm

    Very much informative

    Reply
  11. Tony says

    March 11, 2019 at 5:43 am

    Yey good work man

    Reply
  12. Hotoshe says

    June 3, 2019 at 7:47 pm

    Simply and briefly answered
    Thanks for the help

    Reply
  13. DANISH A KHALIF says

    October 1, 2019 at 8:38 pm

    Nice notes

    Reply

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