In Episode 4 of the Shedding Light on Acids and Bases series, pH, we take an in-depth look at H+ and OH- ions and we explain how the pH scale is used to express how strongly acidic or how strongly basic a particular environment is. We examine how the pH of natural environments affects plant and animal life and how the human body has to carefully control the pH of our organs.

Originally released by Liacos Educational Media, 2021. Streaming video file encoded with permission for digital streaming by Infobase on March 04, 2022. Teacher's guide available under Additional info tag.