Which is the most acidic proton in the following compound: ${\mathrm{CH}}_3\mathrm{COOH}$?

e. Which has a greater Ka: cyclohexanol or phenol?

f. Which is a stronger acid: cyclohexanol or phenol?

Which of the following compounds is the most acidic?

Which of the following molecules has the most acidic hydrogen atoms?

Which of the following carboxylic acids is the most acidic?

In the context of ranking acidity among substituted benzoic acids, which of the following substituents on the benzene ring increases the acidity of benzoic acid the most?

Which of the following compounds contains the most acidic hydrogen atom?

Which of the following four compounds is the most acidic (i.e., has the lowest $pKa$ value)?

Given the following compounds with bolded hydrogens: (A) ${\mathrm{CH}}_3{\mathrm{CH}}_{2}OH$ (bold H on the OH), (B) ${\mathrm{CH}}_3\mathrm{COO}H$ (bold H on the COOH), and (C) ${\mathrm{CH}}_{3}NH{2}_{}$ (bold H on the NH$2_{}$), rank the bolded hydrogens in order of increasing acidity.