Question

When zeolite (hydrated sodium aluminium silicate), is treated with hard water the sodium ions are exchanged with

• A. H⁺ ions
• B. Ca⁺² ions
• C. Mg⁺² ions
• D. Both Ca²⁺ and Mg⁺²

Answer 1

The correct option is D

Both Ca²⁺ and Mg⁺²

Zeolite when treated with hard water exchange $C{u}^{+2}$ and $M{g}^{+2}$ ions (present in hard water) with $N{a}^{+}$ ions.