1. Properties of Matter
Use the processes of filtration, sifting, magnetic attraction, evaporation, chromatography, and flotation to separate mixtures.

2. Let’s explore six ways to separate mixtures:
Filtration
Sifting
Magnetic attraction
Evaporation
Chromatography
flotation

3. Filtration-Used to separate solid particles from a liquid
For example: pouring a mixture through a filter paper in a funnel will trap the solid particles and only allow the particles of the liquid to pass through.
This method is used in water treatment plants to separate dirt and other solid materials from water to produce clean drinking water.

4. Examples of filters: Coffee filters Oil filter for a car Water filter

5. Sifting-
Used to separate smaller solid particles from larger solid particles.
For example: we can use a screen to separate different sized solid materials in sand.—Sand and gravel companies separate rocks into different sizes for road building and other construction projects.

6. Sifting-archaeologists, forensic scientists and law enforcement all use sifting to separate smaller solid particles from larger solid particles.

7. Magnetic Attraction-used to separate magnetic material from a mixture of other substances that are not magnetic.
Cow Magnets: Cow Magnets - Master Magnetics, Inc.

8. Now you try it! SEPARATING BY MAGNETISM.
We are going to separate a heterogeneous mixture of sand and iron particles using a magnet.
If you use a sheet of paper it will help you to separate iron particles from the magnet.
After that you can weigh the mixture and then the sand without iron.
Which is the iron sand percent in the mixture?

9. Evaporation-used to separate a solid that has dissolved in a liquid solution.
The solution is heated or left uncovered until all of the liquid turns to a gas (evaporates) leaving a solid behind.
For example: Salt in salt water or ocean water can be separated by heating the solution until all of the water has evaporated and left the solid salt behind.

10. Flotation-used to separate solids that float in liquid
When the liquid is stirred, the solids that float are skimmed off of the surface of the liquid and put into a different container.
This method is used in some water purification plants.
Can you think of an example where flotation could be used to separate a mixture?

11. Chromatography-used to separate the solutes in a solution.
Click below for the step by step Lab

12. Results
The substances in the solution that dissolve most easily travel the furthest
The substances that do not dissolve easily do not travel very far
The bands of color that are formed allow scientists to identify the substances forming bands of color on different filter papers

13. Exit Ticket What are the 6 methods by which you can separate mixtures?
Which method did we use today?