1. Draw a d_{x 2 -y 2} orbital on Cartesian coordinates. Will ligands approaching along the coordinate axes raise the energy or lower the energy of an electron in this orbital relative to the effect of the ligand on other d orbitals? EXPLAIN!

2. Sketch the splitting of 3d orbitals that occurs in an octahedral field. Label each orbital. How will the orbitals fill for Fe(CN)₆^-4 . How will the orbitals fill for Fe(H2O)₆ ⁺² ?

3. A Cr(H2O)₆ ⁺² absorbs light at a wavelength of 630 nanometers. Show the probable transition that is excited by this light. Calculate the energy in first J/molecule and then in kJ/mole that corresponds to this transition. (Hint: nano = 10 ^-9 . h = 6.6 x 10 ^-34 J-sec. c= 3x10 ⁸ m/sec.)

4. Draw a dxy orbital on Cartesian coordinates. Will ligands approaching along the coordinate axes raise the energy or lower the energy of an electron in this orbital relative to the effect of the ligand on other d orbitals? EXPLAIN!

5. Sketch the splitting of 3d orbitals that occurs in an octahedral field. How will the orbitals fill if the electron configuration is 3d⁷ and the ligands are strong field ligands?How would they fill if the ligands were weak field ligands? Give an example of a weak field ligand. Give an example of a strong field ligand. What would be the difference in how complexes involving these ligands absorbed light?

6. A first row transition metal complex with a 3d ³ electron configuration in an octahedral field absorbs light at a wavelength of 515 nanometers. Show the probable transition that is excited by this light. Calculate the energy in first J/molecule and then in kJ/mole that corresponds to this transition. (Hint: nano = 10 ^-9 . h = 6.6 x 10 ^-34 J-sec. c= 3x10 ⁸ m/sec.)

7. Will the following compounds be colorless or colored? In each case give the charge and electron configuration of the metal in the compound.

a) CaBr₂

b) Sc₂O₃

c) NiSO₄

d) CuCl₂

e) CuCl