General Chemistry
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Using crystal field theory, provide the splitting energy diagram of Cr3+ in [CrCl6]3– and rationalize why [CrCl6]3– is colored.
[CrCl6]3– is colored because an electron can be promoted to the higher-energy d orbitals by absorbing light in the ultraviolet spectrum.
[CrCl6]3– is colored because an electron can be promoted to the higher-energy d orbitals by absorbing light in the visible spectrum.