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.

Answered by Amaya J. Chemistry tutor

48927 Views

See similar Chemistry A Level tutors

Related Chemistry A Level answers

All answers ▸

At what temperature does the reaction become feasible? When ΔH = 492.7 kJmol^-1 and ΔS = 542.6 JK^-1mol^-1.


A buffer solution is made with a pH of 5.000. Solid sodium ethanoate, CH3COONa, is added to 400 cm^3 of 0.200 mol dm^–3 ethanoic acid (Ka = 1.75 × 10^–5 mol dm^–3). Calculate the mass of sodium acetate that must be dissolved in the acid to prepare this


What is meant by the term salt? And how would you confirm if the salt had chloride ions in?


But-1-ene reacts with HBr to form a saturated compound, name and draw the mechanism, then explain how three isomeric products are formed.


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