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Representation of Cell

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Question

You are supplied with the following substances:
Copper rod, Zinc rod, Salt bridge, two glass beakers, a piece of wire, $1$ $M$ $C u S O_{4}$ solution, $1$ $M$ $Z n S O_{4}$ solution.
(a) Represent the cell made using the above materials.
(b) (i) Write the Nernst equation for the above cell.
(ii) Calculate the standard EMF of the cell if
$E_{({Z n}^{2 +} / Z n)}^{o} = - 0.76 V$
$E_{({C u}^{2 +} / C u)}^{o} = + 0.34 V$

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Solution

a) $Z n / Z n S O_{4} ∣∣ C u S O_{4} / C u$
(1M) (1M)
b)
I) $E = E^{0} - \frac{R T}{n f} l o g \frac{[o x i d a t i o n]}{[R e d u c t i o n]}$
$E = E^{0} - \frac{R T}{n f} l o g \frac{[Z n S O_{4}]}{[C u S O_{4}]}$

ii) $E^{0} c e l l = E_{(}^{0} r e d u c t i o n) + E_{(}^{0} o x i d a t i o n)$

$E^{0} c e l l = 0.34 + (- 0.76)$
$E^{0} c e l l = - 0.42 V$

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