How many faraday of electricity are required to deposit 10 g of calcium from molten calcium chloride using insert electrodes? (Molar mass of calcium = 40 g m o l - 1 )

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2 moles of electrons are required to deposit 1 mole of calcium
Mass of calcium deposited $= 10 g$
Molar mass of calcium $= 40 g m o l^{- 1}$
$∴ N o o f m o l e s = \frac{10}{40 g m o l^{- 1}} = 0.25 m o l$
2F are required for 1 mole of calcium
'x' F are required for 0.25 mole of calcium
$∴ x = 0.25 \times 2 = 0.5$ F

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