Web Source: pH and Ionic Equilibria

Acids and bases problem set
http://www.biology.arizona.edu/biochemistry/problem_sets/ph/ph.htm

Acid/Base Equilibrium

http://www.cofc.edu/genchemlab/acidbase.htm

General Chemistry/Acids in equilibrium (WikiBooks)

http://en.wikibooks.org/wiki/General_Chemistry/Acids_in_equilibrium

Molecular dynamics simulation of liquid water
http://chem-www.mps.ohio-state.edu/~lars/liquid.html

pH Scale and Acids/Bases

http://www.elmhurst.edu/~chm/vchembook/184ph.html

pH and Equilibrium

http://preparatorychemistry.com/Bishop_pH_Equilibrium.htm

pH and acid/base equilibrium

http://www.chembuddy.com/?left=pH-calculation&right=toc

Solving Equilibrium Problems

http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch17/bases.php