Answer
a. $I{O_3}^-$
b. $N{O_2}^-$
c. $OI^-$
Work Step by Step
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.
