Ms. Taylor's Blog

https://phet.colorado.edu/en/simulation/ph-scale

Ocean_Acidification

Article #1:  Acids and Bases Explained

Article #2: Carbon Dioxide in Water

Water has a pH of 7.  7 is considered neutral because it is neither acidic nor basic.

The pH scale is logarhythmic.  How many more times alkaline or basic is a liquid with a pH of 10 compared to a liquid with a pH of 11?

A pH indicator such as bromthymol blue changes color as the pH changes.  This is a reversible chemical reaction.