Chemistry: A Molecular Approach (3rd Edition)

Published by Prentice Hall
ISBN 10: 0321809246
ISBN 13: 978-0-32180-924-7

Chapter 15 - Sections 15.1-15.12 - Exercises - Problems by Topic - Page 746: 45b

Answer

$N{O_2}^-$ is the stronger base.

Work Step by Step

- $NO_3^-$ is the conjugate base of a strong acid ($HNO_3$), therefore, it has negligible basicity. - $NO_2^-$ is the conjugate base of a weak acid ($HNO_2$), therefore, it is a weak base. Stronger acids have weaker conjugate bases, so, we can compare the strength of the conjugate acids of these bases: $HNO_3$ and $HNO_2$: $HNO_3$ is a strong acid, and $HNO_2$ is a weak acid, therefore $HNO_3$ is stronger, and $N{O_3}$^- is the weaker base.
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