Question

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

Answer 1

Sodium zeolite removes Ca2+ and Mg2+ ions from hard water. Na2Z + M2+ → MZ + 2Na+ (M = Ca, Mg) where, Z = Al2Si2O8H2O

Answer 2

ANSWER

When zeolite (hydrated sodium aluminium silicate), is treated with hard water the sodium ions are exchanged with. Zeolite when treated with hard water exchange Cu+2 and Mg+2 ions (present in hard water) with Na+ ions.