This document discusses various chemistry concepts including: 1. Distillation and evaporation, which are processes that separate substances based on their boiling points. 2. Evidence of chemical reactions such as changes in color, formation of gases or precipitates, and changes in temperature. 3. The classifications of matter as pure substances or mixtures, and the different types of mixtures and their properties.

1. Chapter 2.1 and 2.2
By: Emma Cohen

2. Distillation
• A process that separates substances in a
solution by their boiling points.

3. Evaporation
• The process in which a liquid becomes a
gas.
• A process used to isolate a solid dissolved
in a liquid property: solubility

4. Evidence of a Chemical
Reaction
• A change in color
• The formation of a gas
• A formation of a precipitate
• A change in the temperature

5. Flammability
• materials that burn and can be used as fuel.

6. How to classify matter
Matter
pure substance mixture
homogenous heterogenous
Element
Compound mixture mixture

7. Mixtures
• Two or more substances that are not
chemically combined with each other and
be separated by Physical means. The
substances in a mixture retain their
characteristic properties.

8. Elements
• The simplest form of pure substances.
• A element has a fixed composition because
it contains only one type of atom

9. Physical Properties
• Viscosity
• Conductivity
• Malleability
• Hardness
• Melting Point
• Boiling Point
• Density

10. Compound
• Two or more elements that are chemically
combined. In a fixed proportion.

11. Colloid
• A mixture that is uniform throughout.

12. Distillation
• A process that seperates the substances in
a slution based on boiling points.

13. Filtration
• A process that separates materials based
on the size of their particles and or
solubility

14. Physical v. Chemical
Change
• Physical change does not have any change in
composition.
• Chemical change does have a change in the
composition.

15. Reactivity of Hydrogen
and Oxygen
• Hydrogen is explosive, and the density of it
is less so the air rises.
• Oxygen will ignite an embruing flame, and
the density is greater so the air sinks.

16. • Test Questions!!!!!

17. • What is the difference between a physical
change and a chemical change?

18. • How can you tell if it is a chemical change?

19. • How would you test for a physical
property?