A group 2 element ‘ $X$ ’ of the periodic table forms a sulphate salt with formula $X S O_{4} . ½ H_{2} O$ . On adding water, this salt can be moulded into different shapes that hardens after some time. Identify the sulphate salt. Why does it show such behaviour? Give the reaction involved.

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Solution

The element ‘ $X$ ’ is calcium and the salt is calcium sulphate hemihydrate also known as plaster of Paris.

By mixing with water it forms gypsm which is responsible for its hardening.

$C u S O_{4} . ½ H_{2} O + 1 ½ H_{2} O \to C u S O_{4} .2 H_{2} O$

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Q. Question 47.
A sulphate salt of group 2 element of the periodic table is a white, soft substance, which can be moulded into different shapes by making its dough. When this compound is left in the open for some time, it becomes a solid mass and cannot be used for moulding purposes.
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A sulphate salt of Group 2 element of the Periodic Table is a white, soft substance, which can be moulded into different shapes by making its dough. When this compound is left in open for some time, it becomes a solid mass and cannot be used for moulding purposes. Identify the sulphate salt and why does it show such behaviour? Give the reaction involved.

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Q. A sulphate salt of group 2 element of the periodic table is a white, soft substance, which can be moulded into different shapes by making its dough. When this compound is left in open for some time, it becomes a solid mass and cannot be used for moulding purposes. Identify the sulphate salt.

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A group 2 element ‘X’ of the periodic table forms a sulphate salt with formula XSO4.½H2O. On adding water, this salt can be moulded into different shapes that hardens after some time. Identify the sulphate salt. Why does it show such behaviour? Give the reaction involved.​

The element ‘X’ is calcium and the salt is calcium sulphate hemihydrate also known as plaster of Paris. By mixing with water it forms gypsm which is responsible for its hardening. CuSO4.½H2O+1½H2O→ CuSO4.2H2O

A group 2 element ‘ $X$ ’ of the periodic table forms a sulphate salt with formula $X S O_{4} . ½ H_{2} O$ . On adding water, this salt can be moulded into different shapes that hardens after some time. Identify the sulphate salt. Why does it show such behaviour? Give the reaction involved.

The element ‘ $X$ ’ is calcium and the salt is calcium sulphate hemihydrate also known as plaster of Paris.

By mixing with water it forms gypsm which is responsible for its hardening.

$C u S O_{4} . ½ H_{2} O + 1 ½ H_{2} O \to C u S O_{4} .2 H_{2} O$