When I was playing with chlorine I used 31.45% muriatic acid and 10% sodium hypochlorite, but there are better ways to generate this fantastically corrosive substance...
Be very, very, very, very, very, very, VERY fucking careful...
You ever seen that movie with the green fog in it? Well, this green fog is about as bad, if not worse. You'll think it's all fun, games, and science fair projects until suddenly you're gasping for air with lungs that don't work anymore and your mom has to clean up your sorry corpse.
I would suggest searching the archives for information about chlorine and better ways to generate it more cleanly before pursuing this any further... and get a good gas mask if you don't already have one.