In the removal of water hardness, permutit is regenerated with a strong solution of
- NaOH
- Na\(_3\)SO\(_4\)
- Na\(_3\)CO\(_3\)
-
NaCl
The correct answer is: D
Explanation
permutit water softener can be regenerated by washing the spent resin with brine( saturated sodium chloride solution). The solution ions replace the calcium or magnesium ions present in it.
\(CaR_{2(s)}\) + 2\(NaCl_{aq}\) → \(CaCl_{2(aq)}\) + 2\(NaR_{2(s)}\)
There is an explanation video available .