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

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

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

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

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

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

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

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

Examples  8aarck 8aarck  hJkQCVM hJkQCVM