Thread: Electrolysis of Low salt concentration water

I want to decompose NaCl in a solution of water let's say 1000 ml. If the salt is 3.5% concentration, that is 35 ml, how much time will i need to pass current of 9V to breakdown NaCl completely. And if the concentration increases will i need to pass current for longer. Is time of Electrolysis independent of soluble concentration?
-Thanks

Sounds like homework. Try to answer it or you won't get much in the way of help. We don't do peoples' homework for them.

Its not H.W. We have holidays now. I'm figuring out how long i need to switch on the current to breakdown the salt into Na and Cl. Just tell me approximately how long by experience? BTW its for my science fair.

You are going to get chlorine gas as a product of that process. This is a dangerous poison. How do you plan to contain it?
This is the process that killed submarine crews in battle situations. The sub would spring a leak and seawater would get to the batteries and short them out generating Cholrine that would kill the crew or at least force them to surface for air.