Hard Water Formation
Country: United States
Date: November 2006
Can you please explain to me how hard water is
formed and how to know that hard water has been created.
"Hard" water means the amount of calcium (Ca[+2]} and magnesium
(Mg[+2]) present in the water. The amount of these ions depends
upon the solubility of various calcium and magnesium minerals
present in the ground from which the water is tapped. Rain water,
which is not exposed to any minerals contains little or no calcium
or magnesium and so is very "soft". The terms "hard" and "soft" are
used for historical reasons and do not have anything to do with the
usual meaning of the words "hard" and "soft".
Click here to return to the Environmental and Earth Science Archives
Update: June 2012