General, Organic, & Biological Chemistry 3rd Edition

by Smith, Janice

Published by McGraw-Hill Education

ISBN 10: 0-07351-124-2

ISBN 13: 978-0-07351-124-5

Chapter 3 - Ionic Compounds - Problems - Page 90: 3.21

Answer

Ferric oxide.

Work Step by Step

From formula of the compound we can find valency of each element. Fe has variable valency i.e. 2 or 3. If Fe has valency of 2 it is called ferrous. If Fe has valency of 3 it is called ferric. Here, valency of Fe = 3. So, the name of the cation = ferric. & the name of the anion = oxide.

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