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When zeolite is treated with hard water,...

When zeolite is treated with hard water, the sodium ions are exchanged with

A

`H^+` ions

B

`H^+` and `Ca^(2+)` ions

C

`OH^-` and `Mg^(2+)` ions

D

`Ca^(2+)` and `Mg^(2+)` ions

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