## Chemistry: The Central Science (13th Edition)

$Cu^{2+} < O_{2} < Cr_{2}O_{7}^{2-} < Cl_{2} < H_{2}O_{2}$
Oxidizing strengths of each are given below: $Cr_{2}O_{7}^{2-}: +1.33$ $H_{2}O_{2}: +1.776$ $Cu^{2+}: 0.337$ $Cl_{2}: +1.359%$ $O_{2}: +1.23$