How much electricity in terms of Faraday is required to produce $20.0 g$ of $C a$ from molten $C a C l_{2}$ .

1 F

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2 F

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20 F

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0.1 F

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Solution

The correct option is A $1 F$
The corresponding reaction is,
$C a^{2 +} + 2 e^{-} ⟶ C a$
So, $2 F$ electricity is required to produce $1 m o l$ of $C a$
The molar mass of $C a$ is $40 g$
$∴$ To produce $20 g$ of $C a$ $1 F$ is required

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