Strength of Oxyacids

[cpufreak3]

Can someone explain why oxyacids with more oxygens are more acidic?

TBR says it's due to the resonance effect, but how/why exactly?

I know the "rule," but I'd like to know the concept behind it, it helps me remember better. Thanks

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[BestDoctorEver]

Can someone explain why oxyacids with more oxygens are more acidic?

TBR says it's due to the resonance effect, but how/why exactly?

I know the "rule," but I'd like to know the concept behind it, it helps me remember better. Thanks

Oxyacids have oxygen which is very electronegative. When oxygen is bonded to the central atom, its atoms withdraw electron density from the central atom, therefore making oxyacids acidic. The more oxygen atoms the greater is the effect and the more acidic is the compound. It is the same as resonance effect, which is electron delocalization

 

[cpufreak3]

Oxyacids have oxygen which is very electronegative. When oxygen is bonded to the central atom, its atoms withdraw electron density from the central atom, therefore making oxyacids acidic. The more oxygen atoms the greater is the effect and the more acidic is the compound. It is the same as resonance effect, which is electron delocalization

Can you be more specific on how the resonance takes place?

For instance, what's the advantage in SO4 vs SO3?

NVM: I figured out the resonance. Thanks

 

[unique135]

Are you talking about HSO3- and HSO4-? or plainly SO3- or SO4-?