Respuesta :
Answer:
**Color Change:** One common observation during a chemical reaction is a change in color. The student could notice a shift in the color of the reactants or the formation of a new colored product. This change can indicate the formation of new substances with different properties than the initial reactants.
2. **Gas Formation:** Another observation to look out for is the evolution of gas. The student may observe bubbles forming or a noticeable release of gas during the reaction. This observation suggests that a gas is being produced as a byproduct of the chemical reaction, indicating a change in the chemical composition of the substances involved.
Explanation:
By carefully noting these observations and others that may occur during the reaction, the student can gather valuable information about the nature and progress of the chemical process taking place.
