1. Chemical Reactions
The fun stuff!

2. Indicators of Chemical Reactions
Color Change
Formation of a precipitate (two liquids form a solid)
Formation of a new gas (bubbling, fizzing)
Temperature change (without adding or taking away heat)
Explosions, flames, light or sound
Odor change

3. Symbols used
Catalyst: a substance that causes or accelerates a chemical reaction without itself being affected.
The chemical is not used in the reaction
Noted above the arrow(s)

4. Heat/Delta symbol (triangle): a symbol of heat or delta above the arrow(s) indicates that heat is needed for the reaction to occur

5. Forward arrow: chemical reaction only processes in one direction
Forward arrow: chemical reaction only processes in one direction. It cannot be reversed
Double arrow: reaction is a reversible reaction and can process in either direction

6. (aq): the substance is aqueous
(aq): the substance is aqueous. Means the substance is dissolved in water
(s or ): the substance is a solid
(l): the substance is a liquid
(g or ): the substance is a gas

7. Word equations are used to describe a reaction happening
Word equations are used to describe a reaction happening. The description should include amounts, states and chemicals. Describing equations need to include all the information that is possible to describe the reaction.

8. Symbolic Equation
Symbolic equations are written so that a chemist can read the reaction in a short abbreviated format. Symbolic equations tell as much as a word equation does but uses only symbols.

9. Symbol to word equations
When writing word equations:
Include all information possible
States, amounts, catalyst
Tell how the reaction is happening

10. Word to symbol equations
Make sure every word that is written is shown as a symbol
Excluding words that aren’t important like of,to,are, etc

11. Naming is still important
Knowing how to name is still important. Not knowing the vocabulary of chemistry will inhibit your ability to speak the language of chemistry.