Demostrador de la Difusión de Gases

Vividly illustrates diffusion of molecules through air. Apparatus consists of a 50cm glass tube, cotton plugs and supports.In experiments, tube is supported horizontally. Several drops of concentrated ammonia solution are applied to the inside end of 1 cotton plug and several drops of concentrated hydrochloric acid are supplied to another. Plugs are inserted into the tube, and after 15-20 minutes, a white disc of ammonium chloride takes shape within the tube.