Answer
a. $ClO{_2}^-$
b. $H_2O$
c. $CN^-$
Work Step by Step
The stronger the acid, the weaker the conjugate base.
Therefore, the base with the weaker conjugate acid will be the stronger one.
- Determine the weaker conjugate acid.
a. $HClO_2$ is weaker than $HClO_4$;
b. $H_3O^+$ is weaker than $HCl$;
c. $HCN$ is weaker than $HClO$
