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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) \[\ce{SO^{2-}4}\] ions
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Solution
(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.
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