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A voltaic cell based on the reaction 2 Eu2+(aq) + Ni2+(s) → 2 Eu3+(aq) + Ni(s) generates Ecell = 0.07 V. Given the standard reduction potential of Ni2+ (Ered = -0.28 V) what is the standard reduction potential for the reaction Eu3+(aq) + e− → Eu2+(aq)?
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