August 31. How can you separate mixtures? Separating is based on the difference in physical...

SEPARATING MIXTURES

August 31

HOW DO YOU SEPARATE?

How can you separate mixtures?

SEPARATING Separating is based on the

difference in physical properties of the substances…Think about how you would separate a bag of m&ms

Some mixtures are easier to separate than others

What would you rather separate?

FILTRATION Filtration: technique that uses a porous

barrier to separate a solid from a liquidHeterogeneous mixtures (sand & water)

DISTILLATION Distillation: separation technique that

is based on differences in the boiling points of the substances involvedHomogeneous mixtures (most)2 liquids

When precisely controlled, distillation can separate substances having boiling points that differ by only a few degrees

CRYSTALLIZATION/BOILING Crystallization: separation

technique that results in the formation of pure solid particles from a solution containing the dissolved substance

You boil out the liquid and are left with the solid crystalsSalt water

CHROMATOGRAPHY Chromatography: technique that

separates the components of a mixture (called the mobile phase) on the basis of the tendency of each to travel or be drawn across the surface of another material (called the stationary phase). Example-Ink

Different masses travel different distances!

REFLECTION Could you separate the colors in black

pen ink? How could you do this and what separation technique would you use?