Color change is evidence that a chemical reaction has occurred.

Question

Quizplus · Accepted Answer

Color change is a common indication that a chemical reaction has occurred. This is because the reaction may produce a different colored substance or involve a change in the arrangement of electrons in the molecules involved, leading to the absorption or emission of specific wavelengths of light that alter the perceived color. However, not all chemical reactions produce a visible color change, so other signs, such as temperature change, gas formation, and precipitation, may also be considered as evidence.

Color Change Is Evidence That a Chemical Reaction Has Occurred