Why does zinc dissolve in hydrochloric acid?
Igloo says The structure of solid zinc consists of a three-dimensional array of positive zinc ions surrounded by ‘free’ electrons. Hydrochloric acid contains mobile hydrogen ions which are attracted to the surface of the zinc, where electron transfer can take place: Zn(s) + 2H+(aq) -> Zn2+(aq) + H2(g) This is a redox reaction. The creation of aqueous zinc ions and the simultaneous destruction of the solid zinc cause the latter to ‘dissolve’ in the acid. ‘Dissolve’ is not a good word to use, however, since it implies a physical, rather than a chemical change. ‘React with’ is a better expression to use in the context of this process. Risk assessment Before attempting any practical work based on the advice and suggestions on this website, you must do the following. Identify any hazards, assess the risks from these hazards, and then decide appropriate control measures to reduce the risks. You must have these approved by those in authority in your school or college laboratory. Do not rely o
