1. Tardigrade
  2. Question
  3. Chemistry
  4. Identify the correct decreasing order of acid strength for the following compounds: text(I) textHClO, text(II) textHBrO, text(III) textHIO

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. Identify the correct decreasing order of acid strength for the following compounds:

$\text{(I)} \, \text{HClO,} \, \text{(II)} \, \text{HBrO,} \, \text{(III)} \, \text{HIO}$

NTA AbhyasNTA Abhyas 2020Classification of Elements and Periodicity in Properties

Solution:

The acidic character of hypohalous acid depends on the electronegativity of halogen. As the electronegativity value of halogen increases the acidic strength of hypohalous acid increases.

Here, Electronegativity of atom $\text{X}$ ( $\text{Cl,} \, \text{Br}$ or $\text{I}$ ) attached to $\text{O}$ decreases down the group, polarity of OH bond decreases, acid strength decreases. It means more the electronegativity of the halogen atom, more the tendency to pull electron and weaker the $\text{O} - \text{H}$ bond and hence proton $\left(\text{(H}\right)^{\text{+}} \text{)}$ can easily be removed.