First slide

Faraday's Laws

Question

The weight of silver (at. wt. = 108 ) displaced by a quantity of electricity which displaces 5600 mL of $O_{2}$ at STP will be

Moderate

A

5.4 g
B

10.8 g
C

54.0 g
D

108.0 g

Solution

$According to Faraday's second law,$
$\frac{W_{Ag}}{E_{Ag}} = \frac{W_{O_{2}}}{E_{O_{2}}} or \frac{W_{Ag}}{108} = \frac{\frac{5600}{22400} \times 32}{8}$
$or \frac{W_{Ag}}{108} = \frac{8}{8} \Rightarrow W_{Ag} = 108 g$

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