Before someone asked me how electrolysis, so this time I will tell you specifically how electrolysis.
PS:Electrolysis will produce chlorine, chlorine is a toxic gas, although chlorine soluble in water, but there was still a small amount of chlorine leak, so be sure to get the job done well ventilated place.
Materials and tools
-Electrolysis requires objects (must be metal)
-A non-conductive containers
-Mobile phone charger
-Brass rod (if not, can also be used with other conductive metal substitute)
-Transparent glue or sticky notes (waterproof and non-conductive adhesive tape)