Miscible liquids are ones that can mix together – like water and ethanol. Immiscible liquids are ones that can’t – like oil and water.
Fractional distillation separates miscible liquids that have different boiling points. It is useful for separating ethanol from a mixture of ethanol and water, and for separating crude oil into different products such as petrol, diesel and kerosene.
When the mixture is heated:
Fractional distillation process to separate ethanol from water