Acids and bases
- Acidification effect on plant, soil, and lake Animation http://www.cengage.com/biology/discipline_content/animations/tree_death.swf
- Comparing Weak and Strong acid Reactions Virtual Experiment http://www.ibchem.com/IB16/08.42.htm#a6
- Ocean acidification Animation http://www.sumanasinc.com/webcontent/animations/content/acidification.html
- pH Calculator http://calculator.tutorvista.com/pH-calculator.html
- pH scale Interactive http://www.johnkyrk.com/pH.html
- pH and dilution effect Interactive https://phet.colorado.edu/sims/html/ph-scale/latest/ph-scale_en.html