When to use Cu+ or Cu2+Fe2+ or Fe3+Pb2+ or Pb4+Mn2+ or Mn4+ Au+ or Au3+Hg+ or Hg2+?

Question

i neeed this info for my important test tom.
pls tell my which one to use.
this is my first year of pure chem so i only need to know which one to use.

Answer 1

If you have an oxidising agent present, then you have Cu2+, Fe3+, Pb4+ and so on. Otherwise, the lower charge is quite often the more stable ion. This is not the case with copper - always use Cu2+ unless a reducing agent is present.

Answer 2

Type in these words on the web search. effects of 3,4-dihydroxyphehylalanine on Cu(2+)-induced inactivation You should have your answer. I just saw it.

Answer 3

Pass!