Question

Rank these species by their ability to act as an oxidizing agent. Fe2+, Li+, Ag+, Cu+

Answer 1

From Electrochemical series Standard reduction potentials for each half cell are

Li+(aq) + e-?Li(s)   -3.05V

Fe2+(aq) + 2e-?Fe(s) -0.44V

Cu+(aq) + e-?Cu(s) +0.52V

Ag+(aq) + e-?Ag(s) +0.80V

hence we may see that reduction potential of Ag is highest so its a best oxidizing agent as it will reduce itself and oxidize others best.