1. Chemical Changes

2. Chemical Properties
Chemical Properties: characteristic of matter that can be observed as it changes to a different type of matter.

3. Chemical Changes
Chemical Change: Change in matter in which the substances that make up the matter change into other substances with new physical and chemical properties.

4. Signs of Chemical Change
Formation of Bubbles
Change in Odor
Color Change
Energy Change

5. Chemical Equations
Reactants: Present before the reaction (left side of equation)
Products: New substances formed during the reaction (right side of equation)
Arrow = yields or gives
2H2 + O H2O

6. Rate of Reactions To increase the rate of the reaction:
Increase the temperature
Increase the concentration
Increase the surface area

7. Law of Conservation of Mass
The total mass before and after a reaction is the same (i.e. Mass is neither lost nor gained).