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) Mg^{2+} ions
(iii) Ca^{2+} ions
(iv) SO_{4}^{2-} ions

Answers (1)

The answer is the option (ii) and (iii) Zeolite is used to remove the hardness of the water. Zeolite is a sodium aluminosilicate.

Ca^{2+} and Mg^{2+} ions in hard water get exchanged with Na^{+} ion of zeolite.

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