Thiocyanate complex formation

Thiocyanate complex formation

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Caption: Thiocyanate complex formation. 0.25 M solution of iron(III) chloride is added drop by drop to a test tube with 0.5 M solution of potassium thiocyanate (KSCN). Iron chloride solution has a yellow colour due to formation of hexaaquairon(III) complex ion ((Fe(H2O)6)3+). When potassium thiocyanate (KSCN) is added, iron(III) ion (Fe3+) complexes with thiocyanate ion ((SCN)-), producing thiocyanatoiron(III) complex ion ((Fe(SCN))2+) that gives the solution its blood red colour. This reaction can be used as a test for Fe3+ ions in a solution.

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Keywords: chemical, chemistry, chemistry experiment, chloride, complex, fe3's, fecl3, feh2o63's, fescn2's, hexaaquairon, ion, iron, kscn, potassium thiocyanate, reaction, reactivity, sequence, series, solution, test tube, thiocyanate, thiocyanatoiron

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