When a metal react with dilute hydrochloric acid which gas is produced?
No. First of all, the metal does not dissapear. When a a metal reacts with an acid it forms a corresponding salt, which usually then dissolves. Second, whther or not a reaction occurs depends on both the acid and the metal. Most metals will not react with a dilute weak acid. Some metals will not even react with most strong metals. Gold, platinum, and some platinum group metals will not react with acid except for…
It does for example with dilute nitric acid. It depends on how strong oxidant is the acid. Metallic copper must be oxidized to react with acid which can be performed by the acid itself (nitric acid, sulfuric acid) or atmospheric oxygen. Thus copper will not react with non-oxidizing acid (like hydrochloric acid) but you can notice that if you let copper with hydrochloric acid on open air, it will oxidize after time, forming green products.