On passing excess carbon dioxide gas through lime water, it first turns milky and then becomes colourless, explain why ? Write all the chemical equation related to it.

On passing excess carbon dioxide gas through lime water, it first turn

1.	On passing excess carbon dioxide gas through lime water, it first turns milky and then becomes colourless, explain why ? Write all the chemical equation related to it.
Answer» Solution :On passing carbon DIOXIDE through LIME water, initially a precipitate of calcium carbonate is formed and on passing excess of carbon cioxide the calcium carbonate is REDUCED to calcium bicarbonate, which is soluble in aqueous medium , hence the solution becomes colourless. `Ca(OH)_(2)(aq.)+CO_(2)(g)toCaCO_(3)(s)+H_(2)O(l)` `CaCO_(3)(s)+CO_(2)(g)+H_(2)O(l) TOCA(HCO_(3))_(2)(aq.)`.