Copper Chloride and Aluminium - part of our "Berzelius Day" uploading 24 videos in 24 hours. Full video containing this reaction at: http://www.youtube.com/watch?v=OQPwPGDQqzs NOTE FROM THE PROFESSOR: 13. This is another dirty reaction. The simple explanation is that Copper chloride reacts with Al to make Cu plus aluminium chloride. And you can see the reddish colour of the metallic copper at the end. The reason that it's complicated is that Al chloride (Al2Cl6) can itself react with water to make Al2O3 plus HCl and the HCl can then react with the cupcake case See our 24 reactions playlist as it unfolds at: http://www.youtube.com/playlist?list=PL6E4F35510525FFF7 Berzelius Day explained: http://www.youtube.com/watch?v=wDXUDq2KLM4 More chemistry at http://www.periodicvideos.com/ Follow us on Facebook at http://www.facebook.com/periodicvideos And on Twitter at http://twitter.com/periodicvideos From the School of Chemistry at The University of Nottingham: http://www.nottingham.ac.uk/chemistry/index.aspx Periodic Videos films are by video journalist Brady Haran http://www.bradyharan.com/