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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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Q. Which is soluble in

N a N O_{2}

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mixture and forming salt?

Q. Given two mixtures: (A)

N a O H

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

100

mL of mixture (B) required

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y

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solution is separate titration using the same indicators.

25 m L

of a mixture of

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when titrated with

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. The same volume of mixture when titrated with

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N a O H

in one litre of this mixture.

Q. In the mixture of

N a H C O_{4}

N a_{2} C O_{3}

, volume of a given

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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Q. In the mixture of

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mL with phenolphthalein indicator and then

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