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Equilibrium Constant from Nernst Equation

E o for a ce...

Question

E $^{o}$ for a cell having 2 electrons involved in redox change is 0.2655 V. The equilibrium constant for the redox change is 10 $^{a}$ . The value of a is :

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Solution

$E_{c e l l} = E^{o} + \frac{0.059}{2} l o g K_{c}$

$⟹ 0.2655 = 0.0295 l o g K_{c}$

$K_{c}$ = $10^{9}$ .

$⟹ a = 9$

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