Chemistry, asked by vinayraj8512, 1 year ago

A sulphate salt of group 2 element of periodic table is a white, soft substance, which can be moulded into different shapes by making its dough. When this compound is left on open for some time, it becomes a solid madd and cannot be used for moulding purposes. Identify the sulphate salt and why does it show such a behavior? Give the reaction involved.

Answers

Answered by prmkulk1978
62
As the Compound is from the element of Group 2 in periodic table. 
We can consider element as  Calcium and its salt as
Calcium sulphate hemi hydrated salt .
Common Name : plaster Of paris
Formula : CaSO4.1/2H20
Chemical Name : calcium sulphate  hemi hydrated salt

Plaster of paris is used in making different Ganesh Idols and other decorative items.
But its very important that Plaster of pairs should be stored in Moisture proof container.
Because on exposure to moisture POP turns to hard solid mass called as Gypsum which cannot be used for molding Purpose.
CasO4.1/2H20 +3/2 H20 ---> CaSO4.2H2O
[POP]                                        [Gypsum]

Answered by dubeyarchna5433
30

We can consider element as Calcium and its salt as

Calcium sulphate hemi hydrated salt .

Common Name : plaster Of paris

Formula : CaSO4.1/2H20

Chemical Name : calcium sulphate hemi hydrated salt

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