In this simulation, students learn how changing the concentration of a solution affects the pH level.

Test the pH of everyday liquids such as coffee, spit, and soap to determine whether each is acidic, basic, or neutral. Investigate how adding more of a liquid or diluting with water affects pH.

Discover where solutions fall on the pH scale using this detailed pH chart.

Students investigate the pH level of household substances by testing a variety of common compounds. Substances are tested with pH strips and placed on the continuum of the pH scale range of 1 to 14. After testing a solution, the student...

Students see a demonstration of a color change using universal pH indicator and then change the concentrations of an acid and a base using a universal indicator to test the pH of the resulting solutions. Through an animation, they see...

Learn the basics of acids, bases, proton concentration, the pH scale, and buffers in this article.

Make your own indicator by using red cabbage leaves and common household items. Includes full list of materials, procedures, and scientific explanation of how to determine if a substance is acidic, basic, or neutral based on the colors...

Acids and bases are scaled. These facts are good knowledge to have when classifying solutions as acidic, basic, or neutral.

Beginning with the example of the hydrangea, this page gives a good overview of acid-base chemistry.