Question

What are some properties that can be used to determine a chemical reaction has occurred?

Answer 1

Change in Color

Heat is released (bubbles in solution)

Sometimes even a change in texture

A new smell

Formation of a precipitate

Answer 2

Some signs of a chemical change are a change in color and the formation of bubbles. The five conditions of chemical change: color change, formation of a precipitate, formation of a gas, odor change, temperature change.