hello. i'm new member here. i have some question regarding my brine electrolysis experiment. really hope somebody can help me. i'm using saturated brine in the compartment and graphite as electrode at anode and cathode. i can see the reaction at the anode and cathode was very vigorous and many bubble coming up from the reaction. hopefully there was chlorine gas collected at the anode (i still do not test that gas). my questions are: (1) can i used the same graphite electrode for the 2nd experiment? will the reaction be the same or the effectiveness will decrease? (2) i've read some information said that only 30% of brine in water is enough for this experiment. is that true? which one will produce more chlorine gas, 30% concentration of brine or saturated brine? (3) based on my experiment, the reaction seems stopped after half an hour later. why this happen? what should i do to continuously produce chlorine gas? (4) i'm using 9volts batery for this experiment. is that ok? what is the most effective voltage/current sholud i used?