Part A:
Though it did not play a role in the video that you watched, the
oxidation state of the metal cation in a coordination complex can
impact the difference in energy of the d orbitals. Consider aqueous
solutions of two coordination complexes of chromium: [Cr(H2O)6]2+
is blue and [Cr(H2O)6]3+ is violet. Based on this observation, make
a statement about the relationship between oxidation state and the
difference in energy of the d orbitals (the d orbital
splitting).
Part B:...