Acid strength of chlorine oxoacids (For the same halogen, acid strength increases with oxidation number of central atom: HClO)
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For the same halogen, acid strength increases with oxidation number of central atom: HClO < HClO₂ < HClO₃ < HClO₄.
What each symbol means
| Symbol | What it stands for |
|---|---|
| oxidation state | Cl oxidation state in oxoacid |
When to use this
More oxygens withdraw electron density via induction/resonance stabilization of conjugate base; perchloric acid is one of the strongest common acids.