The reagents used fro softening of the temporary hardness of water is/

1.	The reagents used fro softening of the temporary hardness of water is/are
Answer» `Ca_(3)(PO_(4))_(2)` `Ca(OH)_(2)` `Na_(2)CO_(3)` `NAOCL` Solution :`Ca(OH)_(2) and Na_(2)CO_(3)` react with bicarbonates of Ca and Mg present in temporary hard water to form the corresponding insoluble CARBONATES which upon filtration give soft water. `Ca(HCO_(3))_(2) + Ca(OH)_(2) to 2CaCO_(3) darr + 2H_(2)O` `Ca(HCO_(3))_(2) + Na_(2)CO_(3) to CaCO_(3) darr + 2NaHCO_(3)`

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