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 2 - Atoms, Molecules, and Ions - Exercises - Page 77: 2.70d

Answer

Cobalt (II) cation has a +2 charge. Hydroxide anion has a -1 charge.

Work Step by Step

There is no overall charge on the compound, thus the charges are balanced. Cobalt can loose two electrons from its outermost shell and can become Cobalt (II) cation. Hydroxide has -1 charge and two atoms of hydroxide anions are present. Thus, overall charges are balanced in this way.

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