Question:
Write the cations and anions present (if any) in the following compounds :
(a) $\mathrm{CH}_{3} \mathrm{COONa}$
(b) $\mathrm{NaCl}$
(c) $\mathrm{H}_{2}$
(d) $\mathrm{NH}_{4} \mathrm{NO}_{3}$.
Solution:
(a) $\mathrm{CH}_{3} \mathrm{O}^{-}$(anion), $\mathrm{Na}^{+}$(cation)
(b) $\mathrm{Na}^{+}$(cation), $\mathrm{Cl}^{-}$(anion)
(c) Molecular compound (no ions)
(d) $\mathrm{NH}_{4}^{+}$(cation), $\mathrm{NO}_{3}^{-}$(anion).