COMEDK2022ChemistryGeneral Organic Chemistry
Give the correct order of acidity of
Options
- AHClO ₄ < HClO ₃ < HClO ₂ < HClO
- BHClO < HClO ₂ < HClO ₃ < HClO ₄
- CHClO ₄ < HClO ₂ < HClO < HClO ₃
- DHClO < HClO ₃ < HClO ₂ < HClO ₄
Correct answer
B. HClO < HClO ₂ < HClO ₃ < HClO ₄
Step-by-step solution
The acidity of oxoacids of chlorine depends on the stability of the conjugate base formed after the loss of a proton. The conjugate bases are ClO ₄⁻ , ClO ₃⁻ , ClO ₂⁻ , and ClO ⁻ . The stability of these conjugate bases is determined by the number of oxygen atoms attached to the central chlorine atom. More oxygen atoms lead to greater delocalization of the negative charge through resonance, thereby increasing the stability of the conjugate base. The number of oxygen atoms in the acids are: HClO ₄ (4), HClO ₃ (3), H