Types of chemical reactions
http://www.usoe.k12.ut.us/CURR/Science/sciber00/8th/matter/sciber/chemtype.htm
There are so many chemical reactions that it is helpful to classify them into 5 general types.
http://library.thinkquest.org/2923/react.html
easy equations
http://www.fordhamprep.org/gcurran/sho/sho/lessons/lesson82.htm
One popular classification scheme for chemical reactions breaks them up into five major categories or types, here you can find examples for each type.
http://www.challenge.state.la.us/edres/lessons/HighSchool/lesson6.htm
Defining/Focusing: Students make preliminary decisions about the type of information needed based on the lesson on chemical reactions, this site shows you real world examples for each type.