Matter-Mixtures and their Separation
What are mixtures?
• When substances are combined without chemically reacting, mixtures are formed.
• In a mixture, each component or part retains its own original properties.
Solutions are mixtures.
In a solution, you observe only one single phase (solid or liquid or gas).
Coffee is a solution.
Lemonade is a mixture.
In a mixture, substances do not react chemically, thus
they can be separated more easily by physical
means.
Evaporate water out!
Pure water
salt
Other examples…Since iron is
magnetic, passing a magnet over the
mixture will pull the magnet out!
Filtration can be used to filter particles out of dirty water.
The recent oil spill in the Gulf has been a challenge for scientists. How do we separate the oil from the water in
an effective way?
Here a clean up crew up scoops up oil from the beach….
The difference between a mixture and
a compound:
Mixtures can easily be separated by physical
means….
Compounds cannot be as easily separated as
substances have chemically combined!
Example: pure H2OExample: candy mixture