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Calculate the standard e.m.f. of the reaction Fe^(3+)+3e^(-)rarrFe_((s)). Given the e.m.f. values of Fe^(3+)+e rarr Fe^(2+) and Fe^(2+)+2e rarr Fe_((s))" as "+0.771 V and =0.44V " respectively." |
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Answer» Solution :Let `E_(1)=0.771V" for "Fe^(3+)+e rarr Fe^(2+)` `E_(2)=0.44V" for "Fe^(2+)+2e rarr Fe_((s))` then `E_(1)+E_(2)=0.331V` and this e.m.f. CORRESPONDS to `Fe^(3+)+3E rarr Fe_((s)).` |
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