Chemistry: The Central Science (13th Edition)

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

Chapter 17 - Additional Aspects of Aqueous Equilibria - Exercises - Page 766: 17.5d


The most appropriate representation is in the drawing number $(ii)$.

Work Step by Step

After the equivalence point, there is an excess of $NaOH$ molecules, therefore, the best representation is the drawing number $(ii)$ At the equivalence point, the $HA$ was totally neutralized by the $NaOH$, therefore, after that point, if we add more base, it will be an excess of the compound, and the image number $(ii)$ has these $OH^-$, which are only visible after the equivalence point.
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