Question

An aqueous solution of nickel (Ni+2) ions will oxidize each of the following metals except:
potassium
chromium
barium
tin
aluminum
Pleasee help, we can't find it in our book!!! ).:

Answer 1

In general, metals tend to make good reducing agents because they can only be oxidized. The reducing ability of the metal is given by the activity series. The more active metal is able to reduce the less active metal cation. This activity series is:

Li>K>Ca>Na>Mg>Al>Zn>Cr>Fe>Ni>Sn>Pb>H2>Cu>Hg>Ag>Pt>Au

i dont see barium on this list

http://pages.towson.edu/ladon/electrochemistry.htm

Answer 2

Thank you so much!(:

Answer 3

u r welcome!