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Nernst Equation

The EMF in Vo...

Question

The EMF (in Volts) for the following electrodes are____________.

$F e | F e^{2 +} (0.2 M)$ $E_{(F e^{2 +} | F e)}^{⊖} = - 0.44 V$ .

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Solution

$F e | F e^{2 +} (0.2 M)$
$E_{F e / F e^{2 +}}^{⊖} = 0.44 V$
$F e \to F e^{+ 2} + 2 e^{-}$ ;
$E = 0.44 - \frac{0.059}{2} l o g (0.2)$

$0.44 - \frac{0.059}{2} \times 0.699 = 0.4609 V$

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F e^{3 +} + 3 e^{-} \to F e

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