Separating solids from liquids – filtration
If a substance does not dissolve in a solvent, we say that it is Unable to dissolve in a particular solvent. For example, sand is insoluble in water.. For example, sand does not dissolve in water – it is insoluble.
The process of passing a mixture through a device - soluble substances pass through the filter as a 'filtrate' but insoluble substances or unwanted material will stay in the filter as a 'residue'. is a method for separating an insoluble solid from a liquid. When a mixture of sand and water is filtered:
- the sand stays behind in the filter paper (it becomes the The material left over at the end of a process, often the material that is removed during purification of a substance.)
- the water passes through the filter paper (it becomes the Fluid that has passed through a filter.)
The slideshow shows how filtration works:
Image caption, A beaker containing a mixture of insoluble solid and liquid. There is filter paper in a filter funnel above another beaker.
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