Explain why compounds of Fe^2+ are coloured in solution. (4 marks)

Fe2+ has an electron configuration of 1s22s22p63s23p63d6. When the ligands of the solution bind to the metal ion the d-orbitals are split which creates an energy gap that allows for electron transitions. The d-electrons absorb light of energy equal to the energy gap. Electrons in lower energy orbitals are promoted to higher energy orbitals. The wavelengths of light that are not absorbed by the electrons are transmitted which give the solution a green colour.

Related Chemistry A Level answers

All answers ▸

Using your knowledge of periodicity and atomic structure, why does the first ionisation energy decrease moving down a group yet increase moving along a period in the periodic table?


What is the C-O-H bond angle in propan-2-ol and why is this? [4 marks]


When using cm3 as the unit for volume to calculate the concentration why must you divide the cm3 by 1000?


Explain the relative resistance to bromination of benzene compared to phenol and compared to cyclohexene.


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences