Teachers Guide Purpose Materials Lab Hints Time Hazards Precautions Disposal Background Makeup Ans. An apparatus is constructed so that dihydrogen is able to diffuse into a flask and thereby increase the gas pressure forcing liquid to be expelled from the flask through an exit tube. When the source of dihydrogen is removed, the dihydrogen escapes more rapidly than air can replace it and air is drawn in through the same tube. Go to Top Hazards Hydrogen may explode.
Hydrochloric acid is corrosive.
Glass tubing can cause puncture wounds and cuts. Remove all ignition source from the laboratory during the experiment. Check that there are no ignition sources such as open flames. Assemble the diffusion apparatus with a Florence flask, a diffusion cup, and a delivery tube. Fill the flask nearly to the neck with water colored using food coloring.