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Diffusion of gases: ammonia and hydrogen chloride
In association with Nuffield Foundation
Source: © Shutterstock
A demonstration to show the diffusion of gases, using ammonia solution and hydrochloric acid. Includes kit list and safety instructions.
Place concentrated ammonia solution on a pad in one end of a tube and concentrated hydrochloric acid on a pad at the other and watch as the two gases diffuse far enough to meet and form a ring of solid ammonium chloride.
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