Ít depends on the contents of the electrolyte. If there are ions or oxidation reactions taking place at a smaller redox potential than the oxidation of Cl
- to Cl
2, then it won't happen unless you really give your cell some volts
. I don't know what it takes to reduce an acetate ion, but I bet it is more than Cl
-. This is basic electrochemistry, study it. But yes, you have to consider the gas evolution, it is a part of the necessary precautions.