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Chemical (X) is used for water softening...

Chemical `(X)` is used for water softening to remove temporary hardness. `(X)` reacts with sodium carbonate to generate caustic soda. When `CO_(2)` is bubbled through `(X)`?

A

`CaCO_(3)`

B

`CaO`

C

`Ca(OH)_(2)`

D

`Ca(HCO_(3))_(2)`

Text Solution

Verified by Experts

The correct Answer is:
c
`Ca(OH)_(2)` is used for the softening of temporary hard water .
`Ca(OH)_(2)(aq) +CO_(2)(g) rarr underset("cloudiness" )(CaCO_(3)(s)+H_(2)O(l)`
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