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Answer the following : (a) Why is Plas...

Answer the following :
(a) Why is Plaster of Paris written as `CaSO_(4)1//2H_(2)O` How is it possible to have half a water molecule attached to `CaSO_(4)` ?
(b) Why is sodium hydrogen carbonate an essential ingredient in antacids ?

Text Solution

Verified by Experts

The formula of plaster of Paris is written as `CaSO_(4).1//2H_(2)O` because one moleculae of water is shered by two formula units of `CaSO_(4)` , I . E ., thr formula is `(CaSO_(4))_(2)*H_(2)O` . Thus , it represents half molecule of `H_(2)O` per formula unit of `CaSO_(4)` .
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Why is the formula of plaster of paris written as CaSO_(4) .1/2 H_(2)O ?

The chemical formula of plaster of paris is CaSO_(4).2H_(2)O

Knowledge Check

  • The name of CaSO_4.1/2H_2O is

    A
    Gypsum
    B
    Epsom salt
    C
    Plaster of Paris
    D
    Dolomite

  • How many hydrogen bonded water molecule(s) are associated with CuSO_(4) .5 H_(2)O ?

    A
    1
    B
    2
    C
    3
    D
    4

  • How many hydrogen bonded water molecule(s) are associated in CuSO_(4).5H_(2)O ?

    A
    Zero
    B
    1
    C
    4
    D
    3

    • Similar Questions

    Explore conceptually related problems

    Answer the following : What is the basicity of H_2SO_4 and why?

    Which of the following is gypsum and which one is plaster or Paris ? (i) CaSO_(4)*(1)/(2)H_(2)O (ii) CaSO_(4)*2H_(2)O

    How many hydrogen-bonded water molecule (s) are associated in CuSO_(4).5 H_(2)O ?

    How many hydrogen-bonded water molecule(s) are associated in CuSO_(4).5H_(2)O ?

    How many hydrogen-bonded water molecule (s) are associated in CuSO_(4).5 H_(2)O ?

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