Lime water in aqueous solution gives white precipitate by passing carbondioxide, but the precipatate dissolves in excess carbondioxide. Why?

Lime water in aqueous solution gives white precipitate by passing carb

1.	Lime water in aqueous solution gives white precipitate by passing carbondioxide, but the precipatate dissolves in excess carbondioxide. Why?
Answer» Solution :Lime water gives insoluble calcium carbonate with CARBONDIOXIDE `Ca(OH)_(2)+CO_(2)rarrCaCO_(3)darr+H_(2)O` Calcium carbonate is soluble in water in the PRESENCE of carbondioxide, GIVING calcium bicarbonate `CaCO_(3)+H_(2)O+CO_(2)rarrCa(HCO_(3))_(2)`