On adding potassium thiocyanate solution to a solution of Fe^3+, the colour obtained is

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On adding potassium thiocyanate solution to a solution of $Fe X^{3 +}$ , the colour obtained is

Fe X^{3 +}

forms the blood-red complex

[Fe (SCN) (H X_{2} O) X_{5}] X^{2 +}

with thiocyanate, a confirmatory test for iron(III).