Chemistry 9th Edition

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

Chapter 11 - Properties of Solutions - Exercises: 41

Answer

The hydration of $Al(OH)_3$ is not energetically favorable enough to overcome the comparatively more energetically unfavorable process of breaking the lattice while the hydration of $NaOH$is energetically favorable enough to overcome the comparatively less energetically unfavorable process of breaking the lattice.

Work Step by Step

$Al(OH)_3$ has a much stronger lattice energy than $NaOH$ because lattice energy is directly proportional to the ion charge, and the charge of the ions in $Al(OH)_3$ is 3 while the charge of the ions in $NaOH$ is 1.
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