What products are formed when each of the following reacts...

What products are formed when each of the following reacts with $\mathrm{HO}^{-} ?$
a. $\mathrm{CH}_{3} \mathrm{OH}$
b. ${ }^{+} \mathrm{NH}_{4}$
c. $\mathrm{CH}_{3} \mathrm{NH}_{3}$
d. $\mathrm{CH}_{3} \mathrm{COOH}$

Key Concepts

Nucleophilicity of Hydroxide Ion

The hydroxide ion (HO?) is a strong base that can also function as a nucleophile, meaning it can donate an electron pair to an electrophilic center. While its role in acid-base reactions typically involves deprotonation, its nucleophilic character is significant in other contexts where it may initiate substitution reactions. Understanding this dual behavior is important in both organic and inorganic reaction mechanisms.

Deprotonation and pKa

Deprotonation refers to the removal of a proton from a molecule by a base. The likelihood of this reaction depends on the acid's pKa compared to the pKa of the product (usually water when HO? is involved). Lower pKa values indicate stronger acids that more readily donate protons. This concept is crucial for predicting whether deprotonation will proceed, even when the acid may be weak.

Acid-Base Reactions

Acid-base reactions are processes in which a proton (H?) is transferred from an acid to a base. These reactions result in the formation of a conjugate base and a conjugate acid, and they are integral to explaining the behavior of substances in aqueous solutions. In these reactions, the strength of the acid and the base (often quantified by pKa values) determines the extent and direction of proton transfer.

Conjugate Acid-Base Pairs

Every acid-base reaction involves conjugate pairs: the acid donates a proton to become its conjugate base, while the base accepts a proton, forming its conjugate acid. Recognizing these pairs is essential for understanding the equilibrium of acid-base reactions and predicting product formation during deprotonation processes.

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