Which of the following is not a disadvantage of using hard water?

Question

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Answer 1

In an ion exchange using hard water is not a disadvantage since it becomes soft by exchanging anions or cations. $N a^{+}$ , $C a^{2 +}$ and $M g^{2 +}$ ions (from water) are exchanged with $H^{+}$ ions (from cation exchange resins). $C l^{-}$ , $S O_{4}^{2 -}$ and $N O_{3}^{-}$ ions (from water) are exchanged with $O H^{-}$ ions (from anion exchange resins).

Answer 2

In an ion exchange using hard water is not a disadvantage since it becomes soft by exchanging anions or cations.

N a^{+}

,

C a^{2 +}

and

M g^{2 +}

ions (from water) are exchanged with

H^{+}

ions (from cation exchange resins).

C l^{-}

,

S O_{4}^{2 -}

and

N O_{3}^{-}

ions (from water) are exchanged with

O H^{-}

ions (from anion exchange resins).