Hard and Soft Water
- Created by: Sophie
- Created on: 15-04-13 16:53
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Hard water contains dissolved calcium or magnesium ions.
- as rain falls, carbon dioxide in the air dissolves in it to form carbonic acid
- H2O + CO2 = H2CO3
- as this flows through chalk or limestone the carbonic acid reacts with calcium carbonate to make calcium hydrogencarbonate.
- H2CO3 + CaCO3 = Ca(HCO3)2
Hard water…
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