1. BELLWORK 8/22/16 SOLIDS LIQUIDS GASES Volume & Shape
Definite Volume & Shape
Spacing between particles
Amount of Energy
High

2. Post – Lab Questions 3CuCl2 (s) + 2Al (s)  2 AlCl3 (l) + 3Cu (s)
Endothermic or Exothermic Reaction?
What are the reactants? Products?
What do the letters in parentheses mean?

3. Classification of Matter
Scientists can classify matter as solid, liquid, or gas, but matter can also be classified as pure substances or mixtures.

5. Classification of Matter
Pure Substance – Every sample of the substance has the same composition and characteristics.
Example: Pure Water (H2O) Salt (NaCl)

6. Pure Substances
Pure substances can also be divided into 2 categories: compounds and elements.

7. Pure Substances
Compound – Two or more elements chemically bonded together.
Examples:
Carbon Dioxide (CO2)
Water (H2O)
Salt (NaCl)
Sucrose (C12H22O11)

8. Pure Substances
Elements – Substances made up of only one type of atom.
- Cannot be separated by any physical OR chemical process.
Examples:
Carbon
Helium
Gold

9. Mixtures
Mixtures are physical combinations of pure substances that have no definite or constant composition — the composition of a mixture varies according to who prepares the mixture.
Even though it may look different, it is still copper and zinc. Each metal retains its own properties like melting point.
Example: Copper and Zinc can be mixed together to produce brass.

10. Heterogeneous Mixtures
A heterogeneous mixture is a mixture whose composition varies from position to position within the sample.
You can separate the mixture by physical means. Ex: Sand and water can be separated by filtration. Iron can be separated out of a mixture by using a magnet.
Examples:
Sand
Granite
Wood

11. Homogeneous Mixtures
A homogeneous mixture, sometimes called a solution, is relatively uniform in composition; every portion of the mixture is like every other portion.
Ex: sugar water, saltwater, air, plasma, coffee, alcohol, water, perfume, alloys, milk, etc
Seawater distillation plant

12. Checkpoint 1. 2. 3. 4. 5. 6.

13. ANSWERS 1. oil and water – heterogeneous 2. milk – homogeneous
3. cereal – heterogeneous
4. chicken noodle soup – hetero
5. orange juice (without pulp) – homo
6. sand - heterogeneous

14. Ch. 1.2 Wksht #2
Correct your Classwork Assignment

15. HOMEWORK
Lab Report #2