The correct order of acid strength is — Ionic Equilibrium Chemistry Question

💡 Solution & Explanation

The acidity of the oxo acids follow the order 2 3 4 HXO < HXO < HXO < HXO . i.e., 2 3 4 HClO < HClO < HClO < HClO . This is because the acid strength of oxyacids of the same halogen increases with increase in oxidation state of the halogen. Thus Cl in HClO4 is in highest oxidation state (+7) and hence strongest acid, while in HClO(Cl is in +1 oxidation state) is weakest acid.