Question

A major source of sodium metal is the electrolysis of molten sodium chloride. What magnitude of current produces 1.0 kg of sodium metal in one hour?

Answer 1

The chemical reaction of NaCl going through electrolysis is: 
2Na+ + 2Cl- --> 2Na(s) + Cl2 

Two electrons are transferred. 

All we need to do is use stoichiometry to solve for the amount of charge transferred 

1000 g Na ( 1 mol / 23 g) X (2 mols e- / 1 mol Na) X ( 96500 C / 1 mol e-) = 8.39 x 10^6 C 

Current is C/s and so we must divide our charge by the time which is one hour, or 3600 seconds: 
8.39x10^6 C / 3600 s = 2331 amps. 

I hope this helps! Good luck :)