CK-12 Foundation
Ck 12: Plix: Recognizing Chemical Reactions
[Free Registration/Login Required] Move the timer by dragging the red dot in order to observe what happens to the experiment over time. You will need to sign-in to access this interactive, but it will be well worth your time.
CK-12 Foundation
Ck 12: Physical Science: Recognizing Chemical Reactions
[Free Registration/Login may be required to access all resource tools.] Signs that a chemical reaction has occurred.
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.