Arrange the following haloacetic acids in strictly decreasing order of acidic strength: (I) (II) (II — GOC and Organic Chemistry Basics Chemistry Question
Question
Arrange the following haloacetic acids in strictly decreasing order of acidic strength: (I) $FCH_2COOH$ (II) $ClCH_2COOH$ (III) $BrCH_2COOH$ (IV) $ICH_2COOH$
Answer: A
💡 Solution & Explanation
Acidic strength depends on the $-I$ effect stabilizing the carboxylate anion. Since the distance (all $\alpha$ -carbon) and number (one halogen each) are tied, we evaluate Power. Electronegativity dictates the $-I$ power: $F > Cl > Br > I$, making fluoroacetic acid the strongest.
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