In a permutit, the calcium and magnesium ions of hard water are exchanged by

Options

A. `CO^(2-)` and `HCO_(3)^(-)` ions of permutit
B. `Na^(+)` ions of permutit
C. `AI^(3+)` ions of permutit
D. `Si^(4+)` ions of permutit.

Answer

B

Explanation

`Na_(2)Al_(2)Si_(2)O_(8). xH_(2)O+Ca^(2+)(" or " Mg^(2+))to CaAl_(2)Si_(2)O_(8). XH_(2)O+2Na^(+)`