Question

How to you prove that the speed of diffusion of ammonia is more than that of the speed of diffusion of hydrochloric acid​

Answer 1

• Put the cotton swabs into the tube simultaneously. The NH3 gas and HCl gas will diffuse through the tube and when they meet, you will get NH4Cl(s) which initially appears as a white ring in the tube. That white ring will be closer to the HCl side than the NH3 side, showing that the NH3 is diffusing faster than HCl.