Chemistry: The Central Science (13th Edition)

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

Chapter 16 - Acid-Base Equilibria - Exercises - Page 720: 16.88c


$HBrO_3$ is stronger than $HBrO_2$ because, it has a greater number of oxygens connected to the central atom (Br).

Work Step by Step

For oxyacids with the same central atom, the difference will be the number of oxygens. A higher number of oxygens causes a greater stability of the negative charge on the conjugate base, which increases the acidity of the compound. Other reason: since $O$ is electronegative, it increases the polarity on the $O - H$ bond, increasing the acidity of the compound.
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