Chemistry: The Central Science (13th Edition)

Published by Prentice Hall
ISBN 10: 0321910419
ISBN 13: 978-0-32191-041-7

Chapter 2 - Atoms, Molecules, and Ions - Exercises: 2.61d

Answer

$(NH_{4})_{2}SO_{4}$

Work Step by Step

Ammonium ($NH_{4}$), as the problem states, has a charge of +1 while Sulfate ($SO_{4}$) has a charge of -2. Because all ionic compounds must have a neutral charge, there must be two Ammonium ions to cancel out the charge of the Sulfate ion, thus making the ionic compound $(NH_{4})_{2}SO_{4}$.
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