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Salts

Soda extract ...

Question

Soda extract is useful when given mixture has any insoluble salt, it is prepared by:

A

fusing soda and mixture and then extracting with water

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B

dissolving

N a H C O_{3}

and mixture in dil

H C l

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C

boiling

N a_{2} C O_{3}

and mixture in dil

H C l

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D

boiling

N a_{2} C O_{3}

and mixture in distilled water

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Solution

The correct option is C boiling $N a_{2} C O_{3}$ and mixture in distilled water
Soda extract is prepared by adding $1 - 2 g$ salt mixture with $5 - 6 g$ anhydrous $N a_{2} C O_{3}$ and $10 m l$ of water to dissolve them. It is followed by heating, filtration, washing and analyzing. If the given salt mixture is partly soluble or insoluble in water then soda extract is prepared for analysis.

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N a N O_{2}

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mixture and forming salt?

Q. Given two mixtures: (A)

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N a_{2} C O_{3}

(B)

N a H C O_{3}

N a_{2} C O_{3}

.

100

mL of mixture (A) required

a

b

1 M

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in separate titration using phenolphthalein and methyl orange indicators respectively while

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mL of mixture (B) required

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25 m L

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when titrated with

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Q. In the mixture of

N a H C O_{4}

N a_{2} C O_{3}

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H C l

x m L

with phenolphthalein indicator and

y m L

with methyl orange indicator in same titration. Hence, volume of

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mL with phenolphthalein indicator and then

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