The crystal field theory accounts for the color of transition metal ions on the bases of splitting of d orbitals. The energy of the crystal-field splitting is 235kJ/mol.
The crystal field theory accounts for the color of transition metal ions on the bases of splitting of d orbitals. The energy of the spliting is obtained from the wavelength in the visible spectrum.
Now the wavelength is 509 nm hence the energy is obtained from;
E = 6.6 * 10^-34 * 3 * 10^8/509 * 10^-9 * 6.02 * 10^23/1 mol * 1/1000 kJ
= 235kJ/mol
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