Electrolysis? CHem Help!?

Question

Electrolysis of molten NaCl in a Downs cell is the major isolation step in the production of sodium metal. Assume that 212 g of Na metal is formed.

(a) How many moles of electrons are required?

(b) How many coulombs are required?

(c) How many amps are required to produce this amount in 6.25 h?

Answer 1

Na+  & 1 e- --> Na  ..... 1mol Na+ to 1 mole electron ratio

212g Na @ 22.99g/mol = 9.22 moles of Na

your first answer: 9.22 moles of electrons

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9.22 mol e- @ 96,485  Coulombs / mole e- = 889,727 Coulombs

your second answer: 8.90e5 Coulombs

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Coulombs = (amp)(seconds)

8.90e5  = amp [ (6.25 hrs) (60 min/hr)(60sec/min)]

amp = 39.54

your answer is 39.5 amps