Electrolysis

• Electrolysis: the breaking down of a molten/dissolved compound by passing an electric current through it.
• Oxidation Is Loss (OIL).

  Negative ions (-) are attracted to the positive anode(+) where they lose electrons (oxidised).
• Reduction Is Gain (of electrons) (RIG)

  Positive ions (+) are attracted to the negative (-) cathode where they gain electrons (reduced).
• Electroplating is used to make objects look more attractive or protect them against corrosion.
• Test for hydrogen: place a lit splint in the gas and it will burn with a pop
• Test for oxygen: place a glowing splint in the test tube and if oxygen is present it will glow.
• The electrode that attracts the positive ion is called the anode.
• The electrode that attracts the negative ion is called the cathode.