Acids and Alkalies: Acid and Base PH Tutorial
A good revision site for GCSE students and above. Contains clear instructions and questions about all aspects of acids and bases, which have been split into small sub sections. There is a short quiz at the end of each section.
[http://www.science.ubc.ca/]
Acids and Alkalies: PH Scale
This exciting site will help Key stage 3 students to fully understand pH. It contains an interactive pH meter to test a range of household substances. Great fun!
[http://www.miamisci.org/]
Acids and Alkalies: Catalysts: What they do.
A catalyst is a substance which alters the rate of a chemical reaction but is chemically unchanged at the end of the reaction.
[http://www.purchon.com/]