Question

Fe3+(aq it. yellow) + SCN(aq colorless) <--> [FeSCN]2+(aq. red)

a student studying this equilibrium begins with an equilibrium mixture that is light pink.
what change will the student observe when a solution containing Fe3+ ion is added to this mixture?

Answer 1

The equilibrium will shift to the right to compensate for the increased concentration of Fe3+ ions and produce [FeSCN]2+ which will cause the solution to become a darker red color.