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Evaporation separation method

Evaporation is the process by which water (and other liquids) changes from a liquid
state to a vapor or gas state.

Evaporation is great for separating a mixture (solution) of a soluble solid and a solvent.
The process involves heating the solution until the solvent evaporates (turns into gas)
leaving behind the solid residue.

Here is a simple example involving a mixture of salt and water.


To get the salt back from the salt water, the solution is heated to boiling point. As it boils,
the water escapes as vapor (gas). After some time, all the water evaporates, leaving a layer
of salt at the bottom of the beaker.

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