human
What is an example of a color change?
gpt
The color of a substance may change when its chemical composition changes. An example of a color change as evidence of a chemical reaction is seen when copper wire is placed in a clear solution of silver nitrate. The product of the reaction is a blue solution. A color change represents more than just a physical change, such as diluting a substance or adding food color to a substance.
Explanation: A color change is often used as evidence of a chemical reaction, indicating that a substance's chemical composition has changed.