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 ▸What is the rate-determining step?
What is entropy?
0.04 moles of sulfur trioxide is placed in a flask (1.50dm^3) and allowed to reach equilibrium at 600 degrees. If 30% of the sulfur trioxide decomposes to sulfur dioxide and oxygen - what is the equilibrium constant?
In the presence of ultraviolet light, ethane and chlorine react to give a mixture of products. What are the products of this reaction?