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Nernst Equation

The standard ...

Question

The standard EMF of deconormal calomel electrode is 0.268 V. The EMF is:

- 0.298 V

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0.327 V

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0.327 V

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0.298 V

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Solution

The correct option is A $0.327 V$
$\frac{1}{2} {H g}_{2} {C l}_{2} + e^{-} ⟶ H g + {C l}^{-} 1 d e c i n o r m a l = 10^{- 1} n o r m a l, E^{o} = 0.268 E = E^{o} - \frac{0.0591}{1} l o g \frac{[{C l}^{-}] [H g]}{\frac{1}{2} [{H g}_{2} {C l}_{2}]} = 0.268 - \frac{0.0591}{1} l o g 10^{- 1} = 0.268 + 0.0591 = 0.327 V$

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