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How many faradays of electricity is required to produce 4.8 ~g of Mg at cathode in the electrolysis of molten MgCl ₂ ? (Molar mass of Mg =24 ~g / mol )

Options

  1. A0.4 ~F
  2. B4 ~F
  3. C10 ~F
  4. D~F

Correct answer

A. 0.4 ~F

Step-by-step solution

(A) Mg ²⁺+2 e ⁻ Mg (at cathode) 24 ~g of Mg =2 ~F of electricity 4.8 ~g of Mg = 4.8 2 24 =0.4 ~F of electricity.

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