Chemistry: The Central Science (13th Edition)

by Brown, Theodore E.; LeMay, H. Eugene; Bursten, Bruce E.; Murphy, Catherine; Woodward, Patrick; Stoltzfus, Matthew E.

Published by Prentice Hall

ISBN 10: 0321910419

ISBN 13: 978-0-32191-041-7

Chapter 20 - Electrochemistry - Exercises - Page 901: 20.24d

Answer

$O_{2} + 4H^{+} + 4e^{-} → 2H_{2}O$ This is a reduction reaction

Work Step by Step

We add H+ to left hand side to balance the equation as it is in acidic medium. Since oxidation state of Oxygen changes from 0 to -2, this is a reduction reaction.

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