1. MIXTURES
Chapter 1 Section 1
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2. Mixture
A combination of two or more substances in which the basic chemical identity of each substance is not changed

3. There are ___2____ types of mixtures - heterogeneous and homogeneous.

4. I. Heterogeneous- ___________________________
A mixture that has different compositions throughout

5. 1. Suspension
a) definition: a mixture where visible particles are suspended in a liquid, solid, or gas and will eventually separate over time.
b) particles reflect light.
c) can be filtered.
d) examples: orange juice, granite, oil & water, liquid antibiotics

6. 2. Colloid
a) definition: a mixture where smaller particles are suspended in a gas or liquid and do not settle out over time.
b) Suspended particles create a cloudy appearance
c) examples: milk, smoke (a solid in a gas), fog (a liquid in a gas), quicksand (sand in water)

7. TYNDALL EFFECT
Use to distinguish between a colloid and a true solution
A beam of light passing through a true solution is not visible
Light passing through a colloid will be reflected by the particles and the light beam will be visible (smoke)

8. Homogeneous-___________________________
A mixture that is the same throughout

9. 1. Solution a) definition: another name for a homogeneous mixture
b) SOLUTE – the substance being dissolved (solid, liquid, or gas)
c) SOLVENT – the substance doing the dissolving (solid, liquid or gas)
d) AQUEOUS SOLUTION - when the solvent is water
e) examples: tea, air, Kool-aid, steel, sugar water

10. 2. Alloy a) definition: solid solutions that contain different metals.
b) examples: 14K gold, sterling silver, bronze, stainless, steel, brass

11. Separating Mixtures
Because each component of a mixture retains its own properties, it is possible to separate the components.
Mechanically
Filtering, sorting
Use Differences in Physical Properties
Ex; solubility, melting point, boiling point, density, color, conductivity, physical state,
evaporation, magnetic properties