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Filtration
Physical Properties: Solubility, Particle Size
Distinguishing between Solutions and Suspensions
Mixtures of solids and liquids can be classified into solutions and suspensions based on their solubility:
A solution is a homogeneous mixture of solute (soluble solid) and solvent (liquid)
Particles of solids in a solution has small particle size, and cannot be filtered.
A suspension is a heterogenous mixture of insoluble solid and liquid
Particles of solids in a suspension has large particle size, and can be filtered.
Identifying the Residue and Filtrate based on Particle Size
Filtration is used to separate suspensions (mixture of insoluble solid and liquid) based on particle size. The filter paper that is used contains many small pores that only allows particles that are small enough to pass through
Particles that are too large to pass through the pores of the filter paper will be collected as the residue
These particles are insoluble solids that cannot dissolve in the solvent
Particles that are small enough to pass through the pores of filter paper will be collected as the filtrate
The filtrate can either be:Solvent
Solution (both solute and solvent)
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