First slide

Oxoacids of Halogens

Question

Which is the strongest acid in the following?

Moderate

A

${HClO}_{4}$
B

$H_{2} {SO}_{3}$
C

$H_{2} {SO}_{4}$
D

${HClO}_{3}$

Solution

$H \underline{\overset{+ 7}{Cl}} O_{4}$ with highest oxidation number and its conjugate base is resonance stabilised, hence it is most acidic. Cl is more electronegative than S.

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