A Clear Solution of Slaked Lime is Made by Dissolving Ca(Oh)2in an Excess of Water. This Solution is Left Exposed to Air.

A clear solution of slaked lime is made by dissolving Ca(OH)2in an excess of water. This solution is left exposed to air. The solution slowly goes milky as a faint white precipitate forms. Explain why a faint white precipitate forms, support your response with the help of a chemical equation.

Correct answer is Ca(OH)₂ + CO₂ → CaCO₃ + H₂O. Explanation: Calcium hydroxide reacts with Carbon dioxide present in the atmosphere to form Calcium carbonate which results in milkiness/white ppt / Formation of Calcium carbonate.