How does filtration differ from evaporation?

Filtration and evaporation are both separation methods, but they are used in different situations and work on different principles.

Filtration is used to separate insoluble solids from liquids. It works by passing the mixture through a filter that traps solid particles while allowing the liquid to pass through. For example, separating sand from water or tea leaves from tea.

Evaporation, on the other hand, is used to separate dissolved solids from liquids. In this method, the liquid is heated and converted into vapor, leaving the solid behind. For example, obtaining salt from seawater.

In simple terms, filtration is used when the solid does not dissolve in the liquid, while evaporation is used when the solid is completely dissolved.