electrolysis of aqueous solutions

Question 1

when water molecules ionise (split), what do they form?

Answer 1

H+ and OH-

Question 2

what is the rule for reactions at the cathode?

Answer 2

hydrogen is produced at the cathode if metal is more reactive then hydrogen

Question 3

its important electrodes don’t react with chemicals we’re making, what is done to ensure this?

Answer 3

platinum is often used as inert electrodes

Question 4

what is the rule for reactions at the anode?

Answer 4

if aqueous solution contains halide ions, the halogen will be produced at anode
otherwise, oxygen is produced