1What type of ligand is the oxalate ion (C2O4^2-) based on the number of electron pairs it can donate to a metal ion?
2During the preparation of potassium trisoxalatoferrate(III) trihydrate, what is the primary purpose of adding hydrogen peroxide (H2O2)?
3Why must the potassium trisoxalatoferrate(III) complex be stored in a dark cupboard during crystallization?
4What is the coordination geometry of the complex ion [Fe(C2O4)3]3-?
5According to the results table, what color change is observed when iron(II) oxalate reacts with hydrogen peroxide and potassium oxalate?
6What reagent is added to the filtrate to facilitate the precipitation of the green crystalline solid K3[Fe(C2O4)3]?
7In the analysis of the complexes, what is the role of adding zinc dust to the solution before the second titration?
8Which starting material was used as the source of iron to first prepare iron(II) oxalate in this experiment?
9What temperature should be maintained during the addition of hydrogen peroxide to ensure the oxidation of Fe2+ to Fe3+ without destroying the peroxide itself?
10The [Fe(OX)3]3- complex is described as being optically active. What is the reason for this property?
