Question
Why AgSCN is selectively precipitated before the formation of FeSCN2+?
given that Ksp of AgSCN = 1x10^-12
and Kinstab of FeSCN2+ = 7.1x10^-3
given that Ksp of AgSCN = 1x10^-12
and Kinstab of FeSCN2+ = 7.1x10^-3