The reagent(s) used for softening the temporary hardness of water is (are):

Options

A. `Ca_(3)(PO_(4))_(2)`
B. `Ca(OH)_(2)`
C. `Na_(2)CO_(3)`
D. `NaOCl`

Answer

B, C

Explanation

`HCO_(3)^(-) + OH^(-) to H_(2)O + CO_(3)^(2-) ` and `CaCO_(3)` will get precipitate
`(c) CO_(3)^(2-) + Ca^(2+) to underset("Precipitated.")underset("(White)")(CaCO_(3))`