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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)? (a) H+ions;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; (b) Mg2+ions’ (c) Ca2+ ions;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; (d) SO24_ ions

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See hard water majorly containd Ca and Mg ions. And zeolites are shape selective catalyst the ion whivh would be almost similar to the size of Na+ will be removed. Thus Mg2+ and Ca2+ both can be exchanged from hard water using zeolites.
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