Check These Links:

Periodic Table-Web Elements  (http://www.shef.ac.uk/chemistry/web-elements/web-elements-home.html)
Acid and Base pH Tutorials (http://www.science.ubc.ca/~chem/tutorials/pH/index.html)
Chemicool   (http://the-tech.mit.edu/chemicool/)
Indiana University Molecular Structure Center (http://www.iumsc.indiana.edu/)
The Web Site for General Chemistry Book (http://www.prenhall.com/brown)
The Web Site for Organic Chemistry Book   (http://www.wiley.com/college/chem/solomons190950/)