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Lime water in aqueous solution gives whi...

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

Text Solution

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Lime water gives insoluble calcium carbonate with carbondioxide
`Ca(OH)_(2) +CO_(2) to CaCO_(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) to Ca (HCO_(3))_(2)`
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