Water - Solubility - Ions
Methods used to Soften Water.
Apart from boiling, hardness can be
from water by using washing soda
or an ion exchange column in a water softener.
What is Washing Soda?
soda is sodium carbonate.
Adding sodium carbonate to hard water
will precipitate insoluble calcium carbonate
or insoluble magnesium carbonate.
This is a way of removing permanent hardness from water.
What is an Ion exchange column?
softener uses an ion
An ion exchange column is a glass tube filled with a resin
containing sodium ions.
Calcium (or magnesium) ions in the water become exchanged
for sodium ions as the water flows through the column.
Eventually, the column becomes saturated in calcium
and stops being effective. The column can be regenerated
by pouring sodium chloride solution (salt water) through it.
The calcium ions are flushed out and replaced with sodium ions,
allowing the column to be reused.
For more information about how a
water softener works
please click here. A water softener is different from a scale inhibitor.
Links Water Search Questions
gcsescience.com Contents The Periodic Table Index Quizzes gcsescience.com
Copyright © 2012 Dr. Colin France. All Rights Reserved.