GKFix MCQ Question

Why do the complexes [Ti(H2O)6]^3+ and [V(H2O)6]^3+ have different colors in aqueous solution?

• A. Because Ti and V are different metals.
• B. Because they have different charges.
• C. Because H2O is a ligand.
• D. Because Ti^3+ (d^1) and V^3+ (d^2) have different numbers of d-electrons, leading to different d-orbital occupancy and different crystal field splitting energies, absorbing different wavelengths of light.