What is the approximate $pKa$ value of acetic acid (${\mathrm{CH}}_3\mathrm{COOH}$)?

Any base whose conjugate acid has a pK_a greater than ______ can remove a proton from a terminal alkyne to form an acetylide ion (in a reaction that favors products).

In the context of acid-base chemistry, what does the $p$ in $p{K}_a$ represent?

Which of the following molecules contains a hydrogen atom with a $pKa$ value between $20$ and $25$?

Why is the $pKa$ of cyclopentane so much higher than the $pKa$ of cyclopentadiene?

Which of the following compounds has the lowest $pKa$ value?

Rank the following organic compounds in the order of increasing pKa.

Rank the following compounds in the order of increasing acidity.