Which of the following species is the strongest reducing agent? Mn2+ Mn Au+ H2 Au
reduging agent ---> is the one that will be oxidized, and reduce the other species
therefore, we need the substance easiest to oxidize (lose electrons)
Mn2+ Mn Au+ H2 Au
Buydefinition, it is always harder to strip 1 electron from a cation, therefore
Mn, H2. Au
Find potentials:
Mn2+ + 2 e− <---> Mn(s) −1.185
2 H+ + 2 e− <---> H2(g) 0.0000 = 0
Au+ + e− <---> Au(s) +1.83
From here, the easiest to oxidize is the most negative, in this case Mn2+
actually, it is easier to form Mn2O7 than to oxidize H2--> H2O or Au to AuO
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