Or the one with the prettiest colour ;)
Speaking of which - i don't know if a regular condom would pass molecules of water but it surely lets through gaseous HCl - at good rate, BTW! (And i used some really tough, studded Soviet condoms from my late grandpa's stock ;D )
HCl molecule is bigger than H2O, does anything else matter?
You also might have to stretch it for this.
Antoncho
Hell I'm just barely old enough to be out of highschool and if I had about thirty grand maybe I'd buy some education in the field, if some other field doesn't interest me more
There's more than one way to skin a cat, in this particular instance a visit to a local public library (generally free :) ) would exponentially increase your creativity. While education is a good thing, few universities teach electrochemistry :(
What terbium is getting at is the function of the cup/membrane/diaphragm in electrolysis is to allow certain ions to travel through the diaphragm and reach the electrode, while not allowing other species to penetrate. Obviously, stainless steel isn't permeable, and thus not suited for this purpose.