Dihydrogen Diffusion Watch the movies. Describe the change in pressure in the flask with blue water when the hydrogen gas surrounds the diffusion cup. Describe the change in pressure in the flask with blue water when the hydrogen gas is first removed from the diffusion cup. Go to Top Teachers Guide Purpose To demonstrate a consequence of the rapid diffusion of dihydrogen, H 2 . This is a dramatic qualitative demonstration of the consequences of the rapid diffusion of dihydrogen.
Hydrochloric acid is corrosive.
Glass tubing can cause puncture wounds and cuts. Remove all ignition source from the laboratory during the experiment. Handle hydrochloric acid cautiously. Wear protective gloves. Wash spills immediately with large amounts of water.