Question

Preparation
of
lime water​

Answer 1

Answer:

Limewater is the common name for a dilute aqueous solution of calcium hydroxide. Calcium hydroxide, Ca(OH)2, is sparsely soluble at room temperature in water (1.5 g/L at 25 °C). "Pure" (i.e. less than or fully saturated) limewater is clear and colorless, with a slight earthy smell and an astringent/bitter taste. It is basic in nature with a pH of 12.4.

Limewater may be prepared by mixing calcium hydroxide (Ca(OH)2) with water and removing excess undissolved solute (e.g. by filtration). When excess calcium hydroxide is added (or when environmental conditions are altered, e.g. when its temperature is raised sufficiently), a milky solution results due to the homogeneous suspension of excess calcium hydroxide.

Answer 2

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• Take half beaker full of Water.
• Add about 5gm of lime that we apply to betel levels.
• Stir the beaker well and let it stand over night.
• Filter the solution the following day.

Use this filtrate in all experiments you perform. This solution should be transparent.