How much electricity in terms of Faraday is required to produce 100 g of Ca from molten `CaCl_2` ?

Options

A. 1 F
B. 2 F
C. 3 F
D. 5 F

Answer

D

Explanation

`CaCl_2 to Ca^(2+) + 2Cl^-`
`Ca^(2+) + underset"2 moles "(2e^(-) ) to underset" 1 mol (40 g )"(Ca)`
40 g of Ca `-=` 2 F
100 g of Ca `-=` 5F