Unformatted text preview: (filter paper) on which the reagents had been coated. Fe 2+ + 6 CN- [Fe(CN) 6 ] 4-3 [Fe(CN) 6 ] 4-+ 4 Fe 3+ Fe(III) 4 [Fe(CN )6 ] 3 The blue color results from interaction between the two irons in different oxidation states (Fe(II) and Fe(III)). Conclusion: In general, the redox reaction provides the appearance of the Prussian blue color in the filter paper due to the interaction between the two Fe ions present existing in different oxidation states. The oxalate ion is in general, the main source of protons that give rise to the reduction of Fe(III) to Fe(II). Furthermore the Fe(II) formed will react with the cyanide ion provided by the Potassium Ferricyanide in the solution to form the complex [Fe(CN) 6 ] 4-, which is the one responsible for the Prussian Blue color adhering on the filter paper....
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This note was uploaded on 07/31/2011 for the course CHE-CHM-BT CHM171L taught by Professor Calderon during the Spring '11 term at Mapúa Institute of Technology.
- Spring '11