Electrolysis

• At the cathode, the least reactive element will be discharged between the hydrogen and the metal
• At the anode, if a halogen (group 7) is present, it will be discharged. If not, oxygen will be produced
• Electrodes are made of graphite because it is a good conductor of electricity, and can withstand high temperatures
• When a salt solution mixes with an inert electrode it always makes a metal
• The independent variable is the one you change