Question

Explain the methods required for the separation of the following mixtures.

pebbles, water, and salt

Answer 1

Methods of separation - Sedimentation, and Evaporation

Sedimentation - It is the process by which heavier impurities in a liquid, typically water, settle to the bottom of the container containing the mixture.

Evaporation - It is a process of conversion of liquid into its vapors, even before reaching its boiling point.

• At first, let the mixture stand, pebbles being heavy will settle down at the bottom.
• Now, tilt the beaker and pour the solution into another beaker.
• That's how pebbles will be removed from the mixture by the sedimentation process
• After this, common salt and water will remain behind in the mixture.
• For the separation of common salt and water, take the solution on a china dish and heat it till all the water evaporates.
• A white solid will be left on the china dish, which can be sun-dried to get the common salt.
• That' is how water and common salt will be separated.