Question

When ammonia combines with HCl, NH₄Cl is formed as white dense fumes. Why do more fumes appear near HCl?

Answer 1

1. When ammonia combines with HCl, NH₄Cl is formed as white dense fumes. The reaction takes place in neutralization between a weak base and a strong acid.
2. The property of the gas is diffusion.
3. Diffusion of gases Ammonia and hydrogen chloride. Concentrated ammonia solution is placed on a pad in one end of a tube and concentrated HCl on the pad at the other. After about a minute, the gases diffuse far enough to meet and a ring of solid ammonium chloride is formed near the HCl end.