Question

during an experiment, a student observes the formation of a precipitate. why does this indicate that a chemical reaction is likely occurring?
a solid forms, and there is a change of color.
a gas forms, and there is a change of color.
a solid forms, and light is emitted.
a gas forms, and light is emitted.

Explanation:

A precipitate is a solid formed from a solution during a chemical reaction. When a precipitate forms, it indicates a chemical change. A change of color can also be an indicator of a chemical reaction.

Answer:

A. A solid forms, and there is a change of color.