Write Lewis structures for each of the following reagents and classify them as either electrophilic, nucleophilic, both, or neither by evaluating whether they will react appreciably with hydroxide ion, $\mathrm{HO}^{\ominus}$, or hydronium ion, $\mathrm{H}_{3} \mathrm{O}^{\oplus}$. Write equations for each of the reactions involved.
a. $\mathrm{NH}_{3}$
b. $\mathrm{NH}_{2}^{-}$
c. $\mathrm{Na}^{\oplus}$
d. $\mathrm{Cl}^{\ominus}$
e. $\mathrm{Cl}_{2}$
f. $\mathrm{CH}_{4}$
g. CN
h. $\mathrm{CH}_{3} \mathrm{OH}$
i. $\mathrm{CH}_{3} \mathrm{O} \mathrm{H}_{2}$
j. $\mathrm{BF}_{4}^{-}$
k. $\mathrm{HBr}$
l. $\mathrm{HC} \equiv \mathrm{C}:^{\ominus}$
$\mathrm{m}$. : $\mathrm{CH}_{2}$
n. $\mathrm{FSO}_{3} \mathrm{H}$
o. $\mathrm{SO}_{3}$