Exhausted permutit does not contain ....... i | vedclass

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(A) Permutit or zeolite is a hydrated sodium aluminosilicate,represented as $NaAlSiO_4$. During the water softening process,the $Na^{+}$ ions in the z

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$Na^{+}$

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(A) Permutit or zeolite is a hydrated sodium aluminosilicate,represented as $NaAlSiO_4$. During the water softening process,the $Na^{+}$ ions in the zeolite are exchanged with the hardness-causing ions like $Ca^{2+}$ and $Mg^{2+}$ present in the water. When all the $Na^{+}$ ions are replaced by $Ca^{2+}$ or $Mg^{2+}$ ions,the permutit becomes 'exhausted'. Therefore,the exhausted permutit contains $Ca^{2+}$ or $Mg^{2+}$ ions but does not contain $Na^{+}$ ions.

Exhausted permutit does not contain $.......$ ion.

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