How Does Zn(NO2)2 React With Acids?

Zn(NO2)2, a compound formed by the combination of zinc and nitrite ions, reacts with acids to produce zinc salts and nitrous oxide gas. The reaction involves the displacement of hydrogen ions from the acid by the zinc ions in the compound. For example, when reacted with hydrochloric acid (HCl), the following reaction occurs:

Zn(NO2)2(s) + 2 HCl(aq) → ZnCl2(aq) + 2 HNO2(g)

The nitrous oxide gas produced in the reaction is responsible for the effervescence observed during the reaction. This reaction can be used to confirm the presence of zinc ions in a sample or to prepare specific zinc salts for further use.