Description: The solubility of ammonia gas in water is demonstrated. A small amount of water is squirted into an inverted flask containing ammonia gas. The ammonia dissolves in the water, creating a vacuum that draws in phenolphthalein/water from below.

This demonstration is also available on video and JCE "Chemistry Comes Alive!" Vol. 2 CD-Rom.

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Source: Shakhashiri, B.Z. Chemical Demonstrations: A Handbook for Teachers of Chemistry

Year or vol: 2 page 205