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) SO42- ions
Solution:
Option (ii) Mg2+ ions and (iii) Ca2+ ions are the answers.
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