Introductory Chemistry (5th Edition)

Published by Pearson
ISBN 10: 032191029X
ISBN 13: 978-0-32191-029-5

Chapter 16 - Oxidation and Reduction - Exercises - Cumulative Problems - Page 606: 95

Answer

a. The reaction is an oxidation-reduction reaction because here Zn is being oxidized and Co is getting reduced and their oxidation numbers changed from 0 to +2 and from +2 to 0 respectively. b. This is not a redox reaction as no electrons are transferred. c. This is not a redox reaction as no electrons are transferred. d. The reaction is an oxidation-reduction reaction because here K is being oxidized and Br is getting reduced and their oxidation numbers changed from 0 to +1 and from 0 to -1 respectively.

Work Step by Step

a. The reaction is an oxidation-reduction reaction because here Zn is being oxidized and Co is getting reduced and their oxidation numbers changed from 0 to +2 and from +2 to 0 respectively. b. This is not a redox reaction as no electrons are transferred. c. This is not a redox reaction as no electrons are transferred. d. The reaction is an oxidation-reduction reaction because here K is being oxidized and Br is getting reduced and their oxidation numbers changed from 0 to +1 and from 0 to -1 respectively.
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