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One faraday of charge is

  • A.9650 coulombs
  • B.965 000 coulombs
  • C.1 coulomb per mole of electrons
  • D.96 500 coulombs

Answer: D

Correct answer: 96 500 coulombs

One faraday is the charge on a mole of electrons:

\[ F = N_A e = 6.022 \times 10^{23} \times 1.602 \times 10^{-19} \approx 96\,500 \ \mathrm{C} \]

and it deposits one gram equivalent of any substance. It is the conversion between the electrical and the chemical accounts, and every electrolysis calculation passes through it.

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