Question

Adding a solution of KSCN to a solution of `Fe^{3+}` salt , forms a blood-red complex. What is that complex `K_3[Fe(SCN)_6] \ or \ Fe[Fe(SCN)_6]` ?

Answer 1

Neither.

Explanation:

Iron(III) forms a 1:1 complex:

`sf(Fe^(3+)+SCN^(-)rarr[Fe(SCN)]^(2+))`

Iron(III) thiocyanate.