When zeolite, which is hydrated sodium aluminium silicate, is treated with hard water, the sodium ions are exchanged with H + ions C a 2 + ions S 2 − 4 ions M g 2 + ions

Options

A. `H^(+)` ions
B. `Ca^(2+)` ions
C. `S_(4)^(2-) ` ions
D. `Mg^(2+)` ions

Answer

B, D

Explanation

`Na_(2)Z+ CaSO_(4)( "or" CaCI_(2)) rarr CaZ + Na_(2) SO_(4) ("or" 2NaCI)`
`Na_(2) Z+ Ca(HCO_(3))_(2) ( "or" MgSO_(4)) rarr MgZ + 2NaCI ( "or " Na_(2) SO_(4))`
`Na_(2) Z + Ca (HCO_(3))_(2) ("or" Mg( HCO_(3))_(2)) rarr CaZ ("or MgZ") + 2NaHCO_(3)`