Chapter 15, Problem 13PE

In each pair, explain why one is a stronger acid than the other: (a) ${\text{HIO}}_{\text{3}}{\text{and HIO}}_{\text{4}}\text{,}$ (b) ${\text{H}}_{\text{2}}{\text{TeO}}_{\text{3}}$ and ${\text{H}}_{\text{2}}{\text{TeO}}_{\text{4}}\text{,}$ (c) ${\text{H}}_{\text{3}}{\text{AsO}}_{\text{3}}{\text{ and H}}_{\text{3}}{\text{AsO}}_{\text{4}\text{.}}$. (Hint: This problem focuses on the effect of oxygen atoms in acids.)