Answer
2 $Ca^{2+}$ ions
Work Step by Step
Oxidation state of Ca is +2, hence there will be two $Ca^{2+}$ ions
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 22 - Chemistry of the Nonmetals - Exercises - Page 994: 22.77a
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