NOAA
Noaa: Estuaries 101 Curriculum: Chemistry in an Estuary
This activity introduces students to the complex chemistry of estuarine water. Students investigate how chemical and physical water quality factors-pH, temperature, dissolved oxygen, and salinity-change and interact over varying time...
US Environmental Protection Agency
Epa: Determining the P H of Common Substances
In this acid rain experiment the students will be "determining the pH of common substances." This is a great lesson plan for an experiment.