Hello! Ammonium metavandate(V), NH4VO3 and dilute HCl: forms the dioxovanadium ion, VO2+; and the following happens: VO3- + 2H+ ----> VO2+ + H2O I can't see what happens in the overall equation. I went for: NH4VO3 + 2HCl ----> NH4Cl + VO2Cl + H2O I couldn't find an online source with this equation, is it right? Any help much appreciated. Many thanks Nobahar.