How to separate a chemical mixture of water, sand, potassium
perchlorate, sodium chloride, isopropyl alcohol and charcoal by
filtation, fractional distallation, and fractional crystallization.

Filter your mixture.This will give you the two insoluble materials,
sand and charcoal. Put this mixture of solids in water and gently
stir. This will briefly suspend the charcoal while allowing the sand
to settle to the bottom. Decant the charcoal suspension while leaving
the sand on the bottom. Doing this a number of times will remove the
charcoal from the heavier sand. Filter the charcoal suspension to
recover the charcoal.

Isopropyl alcohol and water from an azeotrope with a composition of
70% isopropyl alcohol in water. A simple distillation would not
separate this mixture. The presence of the sodium chloride and
potassium perchlorate will help in this separation. The salts
dissociates in the liquid mixture and alters the relative volatilities
sufficiently that the separation may become possible. You need to do a
careful fractional distallation to remove the isopropyl alcohol while
leaving behind the water solution of the two salts.
The salts in this remaining water solution can then be separated by
fractional crystallization.