Question

what will happen if CO2 is passed through lime water for (1) short time (2) long time ​

Answer 1

Answer:

(i) When CO

2

is passed through lime water for a short duration, it turns lime water milky due to the formation of a white precipitate of calcium carbonate.

Ca(OH) 2+co2----CaCo3+H2H2

(White ppt)

(ii) When excess of carbon dioxide gas is passed through lime water then the white precipitate calcium carbonate formed first dissolves due to the formation of a soluble salt calcium hydrogen carbonate Ca(HCO3)2

, and the solution becomes clear again.

CaCO3+co2+H2O-----Ca(HCo3)2

(Soluble)