Answer
a. $HS{O_4}^-$ is weaker than $HCl$
b. $HF$ is weaker than $HNO_2$
c. $HC{O_3}^-$ is weaker than $NH{_4}^+$
Work Step by Step
Table 11.3 contains the relative strengths of these acids.
The acid strength increases from bottom to top. Therefore, if acid A is above acid B in this table, A is stronger than B.
