Calculate the mass, in kilograms, of magnesium produced by the electrolysis of magnesium (II) chloride…

Calculate the mass, in kilograms, of magnesium produced by the electrolysis of magnesium (II) chloride in a cell operating for 24 hours at 500 amperes.
  • A.
    2.7
  • B.
    5.4
  • C.
    10.8
  • D.
    21.7
Correct Answer: Option B
Explanation

Mg + 2e → 24 gms
2f → 24 gms
2 x 96,500 → 24 gms
Q = (500 x 1440 x 60)
Q = 4320000 C
1 mole of mg = (1) / (2 x 96,500) x (43200000) / (1)
= (24)/(1) = (1036800000) / (193000) = 5372.020725 gms
in leg = (5372.020725) / (1000) = 5.4 leg

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