American Chemical Society
Middle School Chemistry: Carbon Dioxide Can Make a Solution Acidic
Students explain that carbon dioxide from any source reacts chemically with water to form carbonic acid. They will also be able to use the color changes of universal indicator to monitor the changing pH of a solution during a chemical...
TED Talks
Ted: Ted Ed: What Is Chromatography?
Find out why leaves change color in the fall, and learn how to do paper chromatography to separate the pigments found in a leaf. [4:24]
Maryland Science Center
Maryland Science Center: Chameleon Jelly [Pdf]
Students learn about chemical reactions that produce a color change in this simple experiment involving jelly.
Frostburg State University
General Chemistry Online: Ten Signs of Chemical Change
Resource provides the ten signs that tell when a chemical change has occured. Each sign has a detailed explanation.
Frostburg State University
General Chemistry Online: Water to Wine
The molecular basis of indicator color changes. Includes Chime structures for the acid and base forms of phenolphthalein, methyl orange, red cabbage indicator, and cyanidin diglucoside.
CK-12 Foundation
Ck 12: Chemistry: Recognizing Chemical Reactions
[Free Registration/Login may be required to access all resource tools.] A tutorial full of explanations, videos, and review questions that covers chemical reaction and indicators of a chemical reaction.
Hunkins Experiments
Hunkin's Experiments: Color
Hunkin's Experiments is a group of simple cartoon illustrations of scientific principles. Some would work well in the classroom, but others have little value beyond entertaining students. All of the projects are easy to do. This one...