Pyridine (CsHgN), abbreviated py, is the molecule N: (a) Would you expect pyridine to act as a monodentate or bidentate ligand? (b) For the equilibrium reaction [Ru(py),(bipy)]²+ + 2 py = [Ru(py),J* + bipy would you predict the equilibrium constant to be larger or smaller than one?

Which of the following chemical elements can form [M(H,O)6]²* complex with the spin-only magnetic momentum of 2.83mB? H20 is a weak-field ligand. Hint: m = 2 {S(S+1)}/2mB. Co Mn Fe Ni

K2Cr207 + 7H2C204 · 2H2O 2K[Cr(C204)2(H20)2] · 2H20 + 6C02 + 13H20 What is role of oxalic acid in the reaction?

You have a solution of the following ion: [Fe(H2O)6]3+ a) Is the ion more likely paramagnetic or diamagnetic? Please explain.  b) Predict how the crystal field splitting would change (increase or decrease) if all H2O ligands were replaced by NO2- in your solution.  c) What is the general color of your original solution and how would the color change in part “b”?