What is the order of acidity of the following compounds?
$EtCO_{2} H$ $CH_{3} CO_{2} H$ $CH_{3} SO_{3} H$ $CF_{3} SO_{3} H$
a b c d

Question

What is the order of acidity of the following compounds? EtCO 2 ​ H CH 3 ​ CO 2 ​ H CH 3 ​ SO 3 ​ H CF 3 ​ SO 3 ​ H a b c d

TestHub · Accepted Answer

Sulfonate conjugate bases are strongly stabilized. CF 3 ​ further withdraws electrons and makes triflic acid stronger than methanesulfonic acid. Both are stronger than carboxylic acids. Ethyl is more electron donating than methyl, so propionic acid is slightly weaker than acetic acid. Thus d > c > b > a.

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