In a chemical equation, the symbol ⇌ is used instead of an ordinary ... some of the hydrogen and nitrogen will react to form ammonia. Stage four The unreacted nitrogen and hydrogen, together ...

Ammonia, NH 3, is an alkaline gas and so turns damp red litmus paper blue. Ammonium ions (NH 4 +) – found in ammonium compounds such as ammonium chloride, ammonium nitrate and ammonium sulfate ...