Comparing Acid Strengths

[C_Montemayor_3J]

With two acids that may be highly similar, what would be the strongest characteristics to determine whether one is stronger than the other? Between two highly similar acids, would it be one that might have weaker or less bonds, or one that has a higher electronegativity differences between its atoms — or another defining characteristic? Does any characteristic typically help trump others?

[Kendall Kay 2G]

I believe that the most important characteristic in determining acid strength is the ease at which the H+ or OH is removed, so I would start by looking at the bond strength between the H and the rest of the molecule for example.

[505989311]

The strength of acids is often determined by their dissociation constants (Ka values). Higher Ka values indicate stronger acids. Electronegativity differences and bond strength can influence acidity, but Ka values are a more specific indicator. No single characteristic determines the acid's strength, it's a combination of factors.

[Evangelina_0ca]

Hello,

As we know the strength of acids is often determined by their ability to donate protons. Generally, the more stable the conjugate base, the stronger the acid. Now some of the factors that affect conjugate base stability include:
Atom size: Larger atoms can better accommodate negative charge (stabilizing the conjugate base)
Electronegativity: Less electronegative atoms stabilize negative charge more effectively
Hope this helps!