Describe with an experiment why ammonia diffuses faster than hydrochloric acid.
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The ring usually forms nearer to the hydrochloric acid end of the tube because hydrogen chloride diffuses more slowly than ammonia. This is because hydrogen chloride has almost twice the molecular weight of ammonia, and the rate of diffusion is inversely proportional to the square root of the molecular mass of the gas.
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according to Grahams law the rate of diffusion or effusion of a gas is inversely proportional to the square root of its molar mass
as molar mass of ammonia is 17 and that of HCl is 36.5 then ...the rate of diffusion of ammonia will be greater because it's molar mass is small
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