Permanent hardness of water may be removed by addition of

1.	Permanent hardness of water may be removed by addition of
Answer» SODIUM carbonate Hardness can be REMOVED by ADDING sodium carbonate (washing soda) or by PASSING the water through an ion-exchange COLUMN.

Answer»

SODIUM carbonate

Hardness can be REMOVED by ADDING sodium carbonate (washing soda) or by PASSING the water through an ion-exchange COLUMN.

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