Question

Difference between lime water and milk of lime

Answer 1

Limewater is the common name for a diluted solution of calcium hydroxide. Calcium hydroxide, Ca(OH)2, is sparsely soluble in water (1.5 g/L at 25 °C[1]). Pure limewater is clear and colorless, with a slight earthy smell and an alkaline bitter taste of calcium hydroxide. The term lime refers to the alkaline mineral, and is unrelated to the acidic fruit.

Limewater is prepared by stirring calcium hydroxide in pure water and filtering off the excess undissolved Ca(OH)2. When excess calcium hydroxide is added to limewater, a suspension of calcium hydroxide particles results, giving it a milky aspect, in which case it has the common name of milk of lime. Milk of lime or a saturated solution of lime (limewater) has a pH of 12.4. It is basic in nature.

Answer 2

When water is added to slaked lime (Which is produced by
adding water to lime) a milky liquid is formed, this milky
liquid is called milk of lime. On adding more of water to it
and then filtering it, a clear liquid remains as filterate.
This filterate is called lime water.