1. Bell Work  Complete the crossword puzzle on your desk using your definitions from chapter 8

2. There are six main types of reactions  Synthesis  Decomposition  Single Replacement or Single Displacement  Double Replacement or Double Displacement  Combustion  Neutralization

3. Synthesis  Two substances combine to make one compound  A + B= AB + ->

4. Decomposition  A reactant breaks apart into two or more elements or compounds  AB= A + B -> +

5. Single Replacement or Single Displacement  One element replaces another element of the same type  A + B = C + AC + -> +

6. Double Replacement or Double Displacement  Elements in two compounds are exchanged  AB + CD = AD + BC

7. Combustion  A combustion reaction is when oxygen combines with another compound to form water and carbon dioxide.  Example:  C 10 H 8 + 12 O 2 ---> 10 C O 2 + 4 H 2 O

8. Neutralization  A special form of double replacement in which an acid and a base form salt and water.  Examples:  Acid + Base -> Salt + Water  Hydrochloric acid + sodium hydroxide -> sodium chloride + water

9. Examples  http://www.youtube.com/watch?v=tE466 8aarck http://www.youtube.com/watch?v=tE466 8aarck  http://www.youtube.com/watch?v=66ku hJkQCVM http://www.youtube.com/watch?v=66ku hJkQCVM