Chemistry

Problem

Four oxoacids are listed below. I.

\mathrm{H_2SO_3}

II.

\mathrm{H_2SO_4}

III.

\mathrm{H_2SeO_3}

IV.

\mathrm{H_2SeO_4}

Which ranking from weakest to strongest first dissociation constant,

K_{a1}

, is most consistent with periodic trends and molecular structure? a)

\text{I} < \text{III} < \text{II} < \text{IV}

\text{III} < \text{I} < \text{II} < \text{IV}

\text{III} < \text{I} < \text{IV} < \text{II}

\text{I} < \text{II} < \text{III} < \text{IV}