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The reagent(s) used for softening the te...

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

A

`Ca_(3)(PO_(4))_(2)`

B

`Ca(OH)_(2)`

C

`NaCO_(2)`

D

`NaOCI`

Text Solution

Verified by Experts

The correct Answer is:
A
`Ca(OH)_(2)+Ca(HCO_(3))_(2) rarr 2CaCO_(3)+2H_(2)O`
`Na_(2)CO_(3)+Ca(HCO_(3))_(2) rarr NaOH+HoCl`
`NaOCl+H_(2)O rarr NaOH+HOCl`
`NaOH+Ca(HCO_(3))_(2) rarr CaCO_(3)+NaCO_(3)+H_(2)O`
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