Question

Hannah does an experiment. She has two colorless chemicals that she mixes together in a beaker. Which of the following indicates that a chemical change occurs when she mixes the two chemicals together? ~Will Fan~!

Answer 1

List the changes from which to choose.

Answer 2

I. The chemicals change color from colorless to purple.
II. A yellow gas forms.
III. A brown solid forms in the bottom of the beaker.
IV. The temperature of the chemicals rises 15°C.

Answer 3

Change in color, release of a gas, formation of a precipitate, and release of heat are all indications of a chemical change

Answer 4

Thank you, I'll go fan.