Chemistry (12th Edition)

Published by Prentice Hall
ISBN 10: 0132525763
ISBN 13: 978-0-13252-576-3

Chapter 2 - Matter and Change - 2 Assessment: 77

Answer

To see if a chemical reaction has taken place check for the production of gas or new substance and notice the formation of red solid at the bottom of the test tube.

Work Step by Step

Chemical change can be seen we the following changes are seen which are new substance is formed, solid precipitate is formed, Color change, Change in odor. These are chemical changes because they are permanent and cannot be reversed.
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