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Hardness of Water and Treatment

Exhausted per...

Question

Exhausted permutit is

A

Na₂Al₂Si₂O₈.xH₂O

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B

CaAl₂Si₂O₈. xH₂O

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C

K₂Al₂Si₂O₈.xH₂O

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D

CaB₂Si₂O₈.xH₂O

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Solution

The correct option is B
CaAl₂Si₂O₈. xH₂O

In exhausted permutit all sodium ions are replaced by Calcium or Magnesium ions

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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

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

H_{2} O

by mass. Hence,

x

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