# What is the product of ammonia and acid?

Usually this gives an ammonium-compound, with the $N {H}_{4}^{+}$ ion.
$N {H}_{3} + {H}_{3} {O}^{+} \to N {H}_{4}^{+} + {H}_{2} O$
(the ${H}_{3} {O}^{+}$ coming from the acid)