Both temporary and permanent hardness in water can be removed by the addition of washing soda. Which of the following reactions represents the removal of permanent hardness in water?

N a_{2} C O_{3} + C a {(H C O_{3})}_{2} ⟶ C a C O_{3} + 2 N a H C O_{3}

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N a_{2} C O_{3} + M g {(H C O_{3})}_{2} ⟶ M g C O_{3} + 2 N a H C O_{3}

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N a_{2} C O_{3} + C a S O_{4} ⟶ C a C O_{3} + N a_{2} S O_{4}

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N a_{2} C O_{3} + C a C l_{2} ⟶ C a O + 2 N a C l + C O_{2}

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Solution

The correct option is C $N a_{2} C O_{3} + C a S O_{4} ⟶ C a C O_{3} + N a_{2} S O_{4}$
For the removal of permanent hardness in water,
$N a_{2} C O_{3} + C a S O_{4} ⟶ C a C O_{3} + N a_{2} S O_{4}$

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Temporary and permanent hardness of water can be removed by:-

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