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.
Answer:
- Slaked lime is also known as Calcium hydroxide .
- When mixed in water, it produces a clear solution of Ca(OH) 2 .
- Calcium hydroxide reacts with Carbon dioxide present in the atmosphere.
- It forms Calcium carbonate which results in milkiness/white ppt CaCO 3 .