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Removal of Hardness in Water

Washing soda ...

Question

Washing soda is used to soften hard water.

A

True

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B

False

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Solution

The correct option is A True
Hardness of the water can be removed by the addition of washing soda to water. Washing soda reacts with the soluble salts of calcium and magnesium and converts them into insoluble carbonates.

$C a C l_{2} + N a_{2} C O_{3} \to C a C O_{3} ↓ + 2 N a C l$

These carbonates can be removed by filtration.

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Similar questions

Q. Washing soda

(N a_{2} C O_{3} .10 H_{2} O)

is widely used in softening of hard water. If

1

L of hard water requires

0.0286

g of washing soda, the hardness of

C a C O_{3}

Q. Washing soda

(N a_{2} C O_{3} .10 H_{2} O)

is widely used in softening of hard water. If 1L of hard water requires 0.0143 g of washing soda, what is hardness of water in terms of ppm of

C a C O_{3}

Q. Washing soda soften both temporal and permanent hardness by :

Q. Assertion :Permanent hardness of water can be removed by using washing soda Reason: Washing soda reacts with soluble calcium and magnesium chlorides and sulphates in hard water to form insoluble carbonates

Q. Consider the following statements.

(a) Potassium carbonate can be synthesised by Solvay process.

(b) Washing soda is used in softening of hard water.

(c) Crystals of sodium hydroxide are deliquescent.

The incorrect statement(s) is/are:`

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