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Hardness of Water:Causes, Types and Treatments

The formula o...

Question

The formula of exhausted permutit is_________.

A

C a A l_{2} S i_{2} O_{8} . x H_{2} O

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B

N a A l_{2} S i_{2} O_{8} . x H_{2} O

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C

C a B_{2} S i_{2} O_{8} . x H_{2} O

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D

K_{2} A l_{2} S i_{2} O_{8} . x H_{2} O

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Solution

The correct option is A $C a A l_{2} S i_{2} O_{8} . x H_{2} O$
Hydrated sodium aluminium silicate $(N a_{2} A l_{2} S i_{2} O_{8} . x H_{2} O)$ is called permutit. These complex salts are also known as zeolites.

Exhausted permutit means, the impurity in water $(C a)$ that is replaced by $N a$ , which becomes $(C a_{2} A l_{2} S i_{2} O_{8} . x H_{2} O)$ .

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Similar questions

The correct formula of exhausted permuitit is :

$(p) N a_{2} A l_{2} S i_{2} O_{8} . x H_{2} O$

$(q) K_{2} A l_{2} S i_{2} O_{8} . x H_{2} O$

$(r) M g A l_{2} S i_{2} O_{8} . x H_{2} O$

$(s) C a A l_{2} S i_{2} O_{8} . x H_{2} O$

Q. In the following sets of reactants which two sets exhibit the amphoteric character of

A l_{2} O_{3} . x H_{2} O

A l_{2} O_{3} . x H_{2} O

O H^{-} (a q)

A l_{2} O_{3} . x H_{2} O

H_{2} O (l)

A l_{2} O_{3} . x H_{2} O

H^{+} (a q)

A l_{2} O_{3} . x H_{2} O

N H_{3} (a q)

500 m L

2 M H C l . 100 m L

2 M H_{2} S O_{4}

and one g equivalent of a monoacidic alkali are mixed together.

30 m L

of this solution required

20 m L

N a_{2} C O_{3} . x H_{2} O

solution obtained by dissolving

143 g N a_{2} C O_{3} . x H_{2} O

in one litre solution. Calculate water of crystallisation of

N a_{2} C O_{3} . x H_{2} O .

N a_{2} S O_{4} . x H_{2} O

50 %

H_{2} O

x

Q. What is the value of X in the given chemical formula of crystalline borax,

N a_{2} [B_{4} O_{5} (O H)_{4}] . X H_{2} O

?

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