Chemistry › Acids and bases › pH scale and other indicators

Age level:  11-13

Web links

1. Management of Water: The pH Scale
   http://www.ec.gc.ca/water/en/manage/qual/e_ph.htm

2. The pH Scale
   http://library.thinkquest.org/3659/acidbase/ph.html?tqskip1=1

3. Waterwatch: Australia publications
   http://www.waterwatch.org.au/publications/

4. What does pH mean?
   http://wiki.answers.com/Q/What_is_pH_and_what_does_it_mean