Why are some complex ions coloured?
Ligands causes d orbitals to split. Electrons get excited to higher energy levels from ground state. Visible light is absorbed to promote electron to a higher energy level and the light that is not absorbed is transmitted to give the colour of the ion.
JO
Related Chemistry A Level answers
All answers ▸Explain why the first ionisation energy of strontium is less than the first ionisation energy of calcium
What is the difference between 'Electrospray Ionisation' and 'Electron Impact' during the ionisation stage in a mass spectrometer?
Please give the definition of Le Chatilier's principle. Use this to explain what would happen if you increased the temperature of an equilibrium in which the forwards reaction is exothermic.
Describe and explain the shape and bond angle of ammonia