136. Solving a chemistry problem

136. Solving a chemistry problem

511. Zinc metal was added to a solution of ammonium metavanadate acidified with hydrochloric acid. As the VO3- ion is reduced, the solution becomes blue, green, and purple. The formation of what ions determines the corresponding color of the solution? Compose the electron-ionic and molecular equations for the reactions of the gradual reduction of the vanadate ion.