On passing excess carbon dioxide gas through lime water, it first turns milky and then becomes colourless. Explain why?write all the chemical equations of the reactions involved.
Answers
Answer:
here you go !!!
Explanation:
When the excess carbon dioxide gas is passed through the lime water, it turns milky first due to the formation of the calcium carbonate as a precipitate which is insoluble in water and then become colorless due to the formation of calcium bicarbonate
formation of water soluble calcium bicarbonate When CO 2 is passed through lime water, it turns milky due to the formation of calcium carbonate which is sinsoluble in water.
limewater Ca(OH) 2 +CO 2 ⟶ milkiness CaCO 3 +H 2 O
However, when excess of CO 2 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 CaCO 3 +H 2 O+ excess CO 2 ⟶ water soluble Ca(HCO 3 ) 2