Chemistry: An Introduction to General, Organic, and Biological Chemistry (12th Edition)

Published by Prentice Hall
ISBN 10: 0321908449
ISBN 13: 978-0-32190-844-5

Chapter 7 - Section 7.5 - Oxidation-Reduction Reactions - Questions and Problems - Page 235: 7.44

Answer

The elemental chlorine was reduced.

Work Step by Step

The charge of the elemental chlorine decreased, going from 0 ($Cl_2$) to $-1$ $(Cl^-).$ The decrease in charge indicates the gain of an electron. Therefore, this is a reduction reaction, which means that the elemental chlorine was reduced.
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