Will aluminum oxidize #"cupric ion"#?

1 Answer
Feb 22, 2016


I think this is incorrect. Aluminum metal should reduce #Cu^(2+)# ion.


Aluminum metal is much more active than copper, and aluminum in copper sulfate should result in deposition of metallic copper:

#2Al(s) + 3Cu^(2+) rarr 2Al^(3+) + 3Cu(s)darr#

If you use aluminum foil, the foil should darken and slowly dissolve as the copper precipitates. The colour of the solution, initially a beautiful blue, should also go progressively pale.