Standard water softener?

In a standard water softener, what ion replaces calcium and magnesium ions?





A K+


B Ba2+


C H+


D Li+


E Na+

Standard water softener?
In a standard water softener, the water to be treated is passed through a bed of small plastic beads called zeolite covered with sodium ions. The calcium and magnesium ions then displace the sodium ions. So E. is the answer.
Reply:E. Sodium