## Chemistry: Atoms First (2nd Edition)

a. $I{O_3}^-$ b. $N{O_2}^-$ c. $OI^-$
These compounds are conjugate bases of oxyacids; therefore, we can compare the strength of each one: - Remember, the weaker the acid, the stronger its conjugate base. a. $HIO_3$ and $HBrO_3$: $HIO_3$ is weaker.** Therefore: $I{O_3}^-$ is the stronger conjugate base. b. $HNO_2$ and $HNO_3$: $HNO_2$ is weaker.*** Therefore: $N{O_2}^-$ is the stronger conjugate base. c. $HOCl$ and $HOI$: $HOI$ is weaker. ** Therefore: $IO^-$ is the stronger conjugate base. ** The one with the most electronegative central atom is the stronger one. *** The one with the greater number of oxygens is the stronger one.