Question

When Zeolite, which is hydrated sodium aluminium silicate is treated with hard water, the sodium ions are exchanged with which of the following ion(s)?

(i) H⁺ ions

(ii) Mg²⁺ ions

(iii) Ca²⁺ ions

(iv) $$\mathrm{SO}{\phantom{A}}_4^{2-}$$ ions

Answer 1

(ii) Mg²⁺ ions

(iii) Ca²⁺ ions

Explanation:

Zeolite is sodium aluminum silicate. It is used to reduce the hardness of water. It has a property to exchange  Mg²⁺ ions and Ca²⁺ ions from hard water by the Na⁺ ions of zeolite.