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### Strengths of Acids

Posted: Sun Nov 22, 2015 7:03 pm
What is the relationship between structure or hybridization and acidity?

### Re: Strengths of Acids

Posted: Sun Nov 22, 2015 7:25 pm
The greater the s-character of a hybrid orbital, the greater the acidity of the acid. So an acid with $sp^{2}$ hybridization will be stronger than an acid with $sp^{3}$ hybridization, and an acid with $sp$ hybridization will be stronger than an acid with $sp^{2}$ hybridization.

### Re: Strengths of Acids

Posted: Mon Nov 23, 2015 2:45 pm
Is there a conceptual reason behind this? I understand the rule that with a greater s orbital, the higher acidity of the acid, but why is this exactly?

### Re: Strengths of Acids

Posted: Sun Nov 29, 2015 5:49 pm
S-orbitals are closer to the nucleus than p-orbitals. So the more s-character a hybrid orbital has, the closer the electrons are to the atom. Such atoms are less willing to share their electron density (have greater electronegativity), and thus have greater acidic character.