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Question

How many Faradays are required to produce 20 g of magnesium from molten MgCl₂? (Atomic mass of Mg = 24 g/mol)

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Explanation

Mg²⁺ + 2e⁻ → Mg . 1 mol Mg (24 g) requires 2F. Moles = (20/24) = 0.833 mol , Charge = 0.833 × 2 = 1.67 F .

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