Chemistry 9th Edition

Published by Cengage Learning
ISBN 10: 1133611095
ISBN 13: 978-1-13361-109-7

Chapter 14 - Acids and Bases - Questions: 25

Answer

The first molecule will be acidic, the second will be basic, the third will be a conjugate base, and the forth will be a conjugate acid.

Work Step by Step

The key part of the picture that distinguishes which will be acidic or basic is in the products part of the picture. We can interpret the picture into the reaction 1_______2_______3______4 $NH_{3} + NH_{3}$ -> $NH_{2}$$^{-}$ + $NH_{4}$$^{+}$ The molecule that donates the hydrogen ion, #1, is acidic, which fits with our Arrhenius definition of acids. Therefore, #2 has to be basic since it is the receptor of the hydrogen ion. When the reaction occurs, #3 will become a conjugate base as it was previously acidic and likewise #4 will become a conjugate acid as it was previously basic.
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