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Question

How much electricity in terms of Faraday is required to produce 20.0 g of Ca from molten CaCl2.

A
1 F
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B
2 F
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C
20 F
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D
0.1 F
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Solution

The correct option is A 1 F
The corresponding reaction is,
Ca2++2eCa
So, 2 F electricity is required to produce 1 mol of Ca
The molar mass of Ca is 40 g
To produce 20g of Ca 1 F is required

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