I have two aqueous solutions---Fe(III)(NO3)3 and KSCN (no precipitate in either, both are fully dissociated into ions). I react five drops of the ferric nitrate solution with one drop of KSCN (assume that we end up with excess Fe[3+]) The net ionic reaction Fe[3+] + SCN[-] (equilibrium arrows!) FeSCN[2-] forms a blood-red complex ion FeSCN[2-]. I add a small amount (10mg) KNO3 and observe a change (more brown or lighter red). Well, the equilibrium shifted; Why do I notice a significant color change???