MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY
Positive ammonia test. There is no visible vapour from the ammonia in the test tube until a glass stirrer dipped in hydrochloric acid is put close by. As the vapours combine a visible smoke of ammonium hydroxide is formed.
Model release not required. Property release not required.