Draw [Cu(H2O)6]2+ and explain why is it blue in colour.
[Cu(H2O)6]2+ is and octahedral shaped complex which I shall draw on the whiteboard.
It is blue for thw following reasons:
When the water ligands bond to the Cu2+ ion, it causes the d orbitals to split into 2 sets at different energy levels. Electrons in the lower energy d-orbitals absorb red light to promote the electrons to a higher energy d-orbital. This means blue light will be reflected and hence the colour of the complex is blue.
AJ
Related Chemistry A Level answers
All answers ▸What is Hess's law?
1.5 g of hydrocarbon undergoes complete combustion to give 4.4 g of CO2 and 2.7 g of H2O. Given this data, what is the empirical formula of this hydrocarbon?
How would you expect the H-NMR spectrum of ethanol to differ from the H-NMR spectrum of ethane?
What evidences are used to prove that Benzene's kekule model is incorrect and that Benzene has a delocalised Pi structure.