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Nernst Equation

EMF of the ce...

Question

EMF of the cell:
$C u / C u^{2 +} (0.01 M) | | C u^{2 +} (0.001 M) | C u$
is $(E^{0} C u^{2 +} / C u = + 0.34 V)$

0

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0.006

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0.03

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0.06

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Solution

The correct option is C $0.03$ V
$E^{\circ} C u^{2 +} / C u = 0.34$

$E^{\circ} C u / C u^{2 +} = - 0.34$
$E_{c e l l}^{o} = E_{r e d}^{o} - E_{o x}^{o}$

$∴ E_{c e l l} = 0.34 - 0.34 - \frac{0.058}{2} l o g [\frac{0.001}{0.01}]$

$= - 0.03 \times l o g 10^{- 1}$

$= 0.03$ V
Option C is correct.

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