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calcium hydrogencarbonate

   Also found in: Wikipedia 0.04 sec.

calcium hydrogencarbonate

Substance found in hard water, formed when rainwater passes over limestone rock:

CaCO3 (s) + CO2 (g) + H2O (l) → Ca(HCO3)2 (aq)

When this water is boiled it reforms calcium carbonate, removing the hardness; this type of hardness is therefore known as temporary hardness.



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