Question

What indicator is typically a sign that a chemical change has taken place?

1, a change in the shape of the substance
2. a change in the size of the substance
3. the formation of a precipitate
4. The formation of a liquid from a solid

Answer 1

The formation of a precipitate is a typical indicator of a chemical change, marking the production of a new substance from a chemical reaction.

Step-by-step explanation:

The indicator that typically signifies a chemical change has taken place is the formation of a precipitate. Chemical changes involve a substance being transformed into a different substance, which can be indicated by various signs. Indications of a chemical reaction include a change in color, generation of heat or light, production of gas, and the formation of a solid product known as a precipitate. Among these, the formation of a precipitate is a clear sign that a new substance, typically insoluble in the reaction mixture, has been produced.