In the removal of water hardness, permutit is regenerated...
In the removal of water hardness, permutit is regenerated with a strong solution of
NaOH
Na3SO4
Na3CO3
NaCl
Correct answer is D
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.
CaR2(s) + 2NaClaq → CaCl2(aq) + 2NaR2(s)
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