electrolysis problem?
Metallic magnesium can be made by the electrolysis of molten MgCl2.
a)What mass of Mg is formed by passing a current of 5.65 A through molten MgCl2 for 4.00 days?
b)How many minutes are needed to plate out 14.00 g Mg from molten MgCl2, using 2.70 A of current?
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Additional information you may need:
1 ampere = 6.241 × 10^18 electrons/sec
1 mole = 6.02 x 10^23 molecules
it takes 2 electrons per atom of Mg (from MgCl2) to separate Mg from Cl
# of electrons is your common unit. Convert days to seconds.
Apply the formula that John listed in his answer
Electrolysis of molten salt gets sodium and chlorine, usually done using the Downs cell. Electrolysis of a solution gets hydrogen as it is not possible to have metallic sodium in water for very long!
moles product = (current in amps)(time in seconds)/(faradays constant*number of electrons)
convert grams to moles to plug into this formula