Miscible or Immiscible?

Calvin Kingsbury


Homogeneous Solution - A solution which has uniform composition and properties throughout.
Miscible Liquids - Liquids that can mix with other liquids to form a homogeneous solution.

Immiscible Liquids - Liquids that cannot mix with other liquids to form a homogeneous solution.

Miscible Liquids

If two liquids dissolve in each other and their particles mix to form a solution; they are known as miscible. The particles mix evenly throughout the solution, and it is known as a homogeneous solution. They will not separate naturally after this and can then only be separated through a process called Fractional Distillation.

Fractional Distillation

Fractional Distillation can be used to separate mixtures of miscible liquids as it takes advantage of the different boiling points of each mixed liquid.

The mixture of liquids is heated and the liquids evaporate, the vapours then condense in a fractioning column - The fraction with the highest boiling point condenses near the bottom of the column, and the fraction with the lowest boiling point reaches the top of the column.

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Immiscible Liquids

Liquids that do not mix completely with each other are known as immiscible. When you shake immiscible liquids, they seem to mix but soon separate out again. Immiscible liquids can be separated using a separating funnel.

Separating Funnel

When you open the tap, the lower liquid runs out of the funnel and can be collected in a beaker. You then close the tap before the other liquid begins to escape out. You can collect this liquid with another beaker.

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