Question

What happens when CO2 is passed through limewater and why does it disappear on passing excess CO2

Answer 1

when co2 is passed through lime water then the color of lime water turns milky and when it is passed in excessive quantity the milky color of lime water disappears

Answer 2

Answer:

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Explanation:

When CO2 is passed through lime water, it turns

milky due to the formation of calcium carbonate which

is insoluble in water.

(limewater)Ca(OH)2+CO2⟶milkiness)CaCO3+H2O

However, when excess of CO2 is passed through this

solution, the milkiness disappears. This is due to the

formation of calcium bicarbonate which is colorless and

soluble in water.

(milkiness)CaCO3+H2O+(excess)CO2⟶(water soluble)

Ca(HCO3)2

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