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.

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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.

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Size: 4686px × 3841px
Photo credit: © MARTYN F. CHILLMAID/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: -, acid, alkaline, ammonia, ammonium, background, blue, chemical, chemistry, chloride, diffusion, education, experiment, glass, hydrochloric, hydroxide, pungent, school, science, smoke, solution, stirrer, test, tube, volatile