In comparing the acidic strength of substituted acetic acids, which of the following compounds will — GOC and Organic Chemistry Basics Chemistry Question

💡 Solution & Explanation

Acidic strength depends on the stability of the conjugate base (carboxylate anion). Electron-withdrawing groups ($-I$ effect) disperse the negative charge, stabilizing the anion. Since Fluorine is the most electronegative halogen, it exerts the strongest $-I$ effect, making fluoroacetic acid the strongest acid.