1. Matter—Mixtures and Pure Substances
Packet #4

2. Mixture A mixture is a physical blend of two or more components.
Chicken Noodle Soup
Chicken
Noodles
Broth

3. Mixture II Mixtures can be classified into two groups
Heterogeneous mixture
Mixture in which composition is not uniform throughout
Chicken noodle soup
Homogenous mixture (solution)
Components are evenly distributed throughout
Oil & Vinegar

4. Mixture III Homogenous Mixture
Many solutions are liquids, but some may be gases or solids (alloys).
Air
Stainless steel
Iron
Chromium
Nickel

5. Separation of Mixtures

6. Separation of Mixtures
Filtration
Process that separates a solid from the liquid in a heterogeneous mixture.
Straining pasta from water

7. Separation of Mixtures II
Distillation
The boiling of a liquid to produce a vapor that is then condensed into a liquid

8. Pure Substance

9. Pure Substance
A pure substance always has the same composition while a mixture can contain one or more pure substances.
Elements* or compounds*
A compound contains only particles of identical atomic composition—therefore it always has the same composition.
In contrast, a mixture is a collection of compounds and/or elements that are present in varying amounts.
A pure substance always has the same composition.
Pure water is a pure substance
Sea water is a mixture
A compound contains only particles of identical atomic composition—therefore it always has the same composition.
In contrast, a mixture is a collection of compounds and/or elements that are present in varying amounts.
A pure substance always has the same composition.

10. Heterogeneous Mixture
Summary
Matter
Mixtures
Homogenous Mixture
Solution
Heterogeneous Mixture
Pure Substances
Found within Mixtures
Compounds
Elements