Ammonium chloride formation. A glass tube is plugged by cotton balls at both ends. Small amounts of concentrated ammonium hydroxide (NH4OH, 28-30%) and concentrated hydrochloric acid (HCl, 32-36%) are used to wet the two balls. Colorless ammonia (NH3) and hydrogen chloride (HCl) gases diffuse from the respective balls. When they meet, they react and produce a ring of fine white powder of ammonium chloride: NH3 + HCl -> NH4Cl. Molecular weight of ammonia is less than that of hydrogen chloride, therefore it diffuses faster and the white ring is formed closer to the ball with the hydrochloric acid. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Turtle Rock Scientific |
Taille de l’image : | 5160 px × 3429 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |