Chemical Reaction Experiment Result

What was the first indication that a chemical change was taking place in the experiment?

A. the crystals were added to the liquid.

B. the crystals dissolved in the liquid.

C. the temperature of the liquid increased.

D. the color of the mixture changed.

Answer:

C. the temperature of the liquid increased.

The first indication that a chemical change was taking place in the experiment was when the temperature of the liquid increased. This increase in temperature indicated that a chemical reaction was occurring, leading to the transformation of the clear liquid into a bright red color.

When the student added white crystals to the clear liquid, the crystals dissolved in the liquid and caused it to become warm. The change in temperature was a key indicator of the chemical reaction taking place.

Chemical reactions often involve the release or absorption of heat, which can result in changes in temperature. In this experiment, the increase in temperature signaled the beginning of a chemical transformation, ultimately leading to the change in color of the liquid.