20.3 Acidic, Basic, and Neutral Solutions

Water Reacting with Water

John shows the acid/base chemical reaction that occurs between to water molecules. Because was is such a weak acid and weak base, the amount of product formed from this reaction is relatively small, yet it is very significant. Duration: 5:55.

The pH Scale and Meter

The pH of normal household solutions are discussed. The pH meter is used to show the pH of various solutions. Duration: 5:10.

KM: Red Cabbage

Pigments in red cabbage are natural pH indicators. Kai and Maile explain how to make and use red cabbage stock to test the pH of common household products. Note: the bleach turns the pigment yellowish because it oxidizes the pigment not because of the high pH. Duration: 3:24.