Illustrated Glossary of Organic Chemistry

Ammonia (1) NH3. The simplest amine, and a modest base (NH4+ pKa = 9.4). When liquid (ammonia has bp -33 oC), occasionally used as a polar (ε = 25 at -59 oC) protic solvent for example in a Birch reduction.

Molecular Structure of Ammonia

Lewis structure
Ball and spoke
Space-filling model
Molecular model kit

(2) An aqueous solution of NH3. This solution contains free ammonia plus ammonium hydroxide (NH4+ -OH).

Household ammonia
is the same as
laboratory ammonium hydroxide.