You are studying coordination compounds of iron with cyanide ligands. You add 0.270 g of yellow potassium ferrocyanide to1.00 liters of a solution of excess potassium nitrite. You observe that the pH increases from neutral to 11.17 and the color changes from yellow to red. You isolate a red crystalline compound, and hypothesize that at least one of the cyanide ligands has been substituted for nitrosyl (NO):K4Fe(CN)6 + (x)KNO2 + H2O → K4−2xFe(CN) 6−x (NO) x +(x)KCN + (2x)KOHHow many grams of iron are contained in 0.150 of the red complex?
