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Latimer diagram FeO4(2-) to Fe3+ to Fe2+ to Fe: standard potential of FeO4(2-)/Fe2+

The same question, asked 2 times: 10 Apr 2023*, 23 Jan 2025. Every wording below, oldest first.

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  1. Question 1

    10 Apr 2023

    56
    FeO42−→+2.2 VFe3+→+0.70 VFe2+→−0.45 VFe0FeO_{4}^{2 -}\overset{+ 2.2\text{ }V}{\rightarrow}Fe^{3 +}\overset{+ 0.70\text{ }V}{\rightarrow}Fe^{2 +}\overset{- 0.45\text{ }V}{\rightarrow}Fe^{0} EFeO42−/Fe2+θE_{FeO_{4}^{2 -}/Fe^{2 +}}^{\theta} is x×10−3 Vx \times10^{- 3}\text{ }V. The value of xx is__

  2. Question 2

    23 Jan 2025

    30
    FeO42−→+2.0VFe3+→0.8VFe2+→−0.5VFe0FeO_{4}^{2 -}\overset{+ 2.0V}{\rightarrow}Fe^{3 +}\overset{0.8V}{\rightarrow}Fe^{2 +}\overset{- 0.5V}{\rightarrow}Fe^{0} In the above diagram, the standard electrode potentials are given in volts (over the arrow). The value of EFeO42−/Fe2+⊖E_{FeO_{4}^{2 -}/Fe^{2 +}}^{\ominus} is

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