Question:
Among the following oxoacids, the correct decreasing order of acidic strength is
Among the following oxoacids, the correct decreasing order of acidic strength is
Updated On: Jul 29, 2024
- $HOCl > HClO_2 > HClO_3 > HClO_4$
- $HClO_4 > HOCl > HClO_2 > HClO_3$
- $HClO_4 > HClO_3 > HClO_2 > HOCl$
- $HClO_2 > HClO_4 > HClO_3 > HOCl$
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The Correct Option is C
Solution and Explanation
$HClO_4 {<=>} ClO^{-}_{4}+H^+$
$HClO_3 {<=>} ClO^{-}_3+H^+$
$HClO_2 {<=>}ClO^{-}_2+H^+$
$HOCl {<=>}ClO^{-}+H^{+}$
Resonance produced conjugate base
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(iv) $ClO^-$ is not resonance stabilized
As per resonance stability order of conjugate base is
$ClO _{4}^{-}> ClO _{3}^{-}> ClO _{2}^{-}> ClO ^{-}$
Hence acidic strength order is
$HClO _{4}> HClO _{3}> HClO _{2}> HClO$
$HClO_3 {<=>} ClO^{-}_3+H^+$
$HClO_2 {<=>}ClO^{-}_2+H^+$
$HOCl {<=>}ClO^{-}+H^{+}$
Resonance produced conjugate base
undefined(iv) $ClO^-$ is not resonance stabilized
As per resonance stability order of conjugate base is
$ClO _{4}^{-}> ClO _{3}^{-}> ClO _{2}^{-}> ClO ^{-}$
Hence acidic strength order is
$HClO _{4}> HClO _{3}> HClO _{2}> HClO$
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