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

Options

A. `H^(+)` ion
B. `Ca^(2+)` ion
C. `SO_(4)^(2-)` ion
D. `OH^(-)` ion

Answer

B

Explanation

`underset("Sodium zeolite")(Na_(2)Z)+underset("From hard water")(CaCl_(2))rarrunderset("Calcium zeolite")(CaZ+2NaCl)` `["where, "Z=Al_(2)Si_(2)O_(8).xH_(2)O]`