Reaction (Oxidised form + ne–
®
®
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® Reduced form)
E o/V
 Increasing strength of oxidising agent
 Increasing strength of reducing agent
1 A negative Eo means that the redox couple is a stronger reducing agent than the H+/H2  couple 2 A positive Eo means that the redox couple is a weaker reducing agent than the H+/H2  couple