Thursday
October 30, 2014

Homework Help: Chemistry

Posted by Annie on Saturday, May 30, 2009 at 11:05am.

An ion exchange process may be used to remove ions causing hardness of water.
Outline how this works.

1. Ca2+ and Mg2+ are the ions that cause the hardness of water, one example of softening the water is to react the hard water with NaCO3 (Sodium bicarbonate) to soften the water. I don't know how to get the equation to explain this, and how the ion exchange process works to remove the ions.

2. I know how to get rid of the Ca2+ ions, but I don't know if it's enough.

Ca(2+) + 2HCO3(-) --> Caco3 + H2O +CO2
[calcium ion, reacts with bicarbonate to produce calcium carbonate (precipitant), water and carbon dioxide]

:S

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