When hard water is passed through permutit, which ions are exchanged with `Ca_2` and `Mg^(2+)`?

Options

A. `Na^(+)`
B. `AI^(3+)`
C. `H^(+)`
D. `K^(+)`

Answer

A

Explanation

For the softening of water by permutit process, the water is percolated through the bed of zeolite packed in a vertical cylinder. The zeolite may be represented as `Na_(2) Z` and the following reactions occur in the zeolite bed:
`Na_(2)`