electrolysis of aqueous solutions Flashcards
1
Q
what do water molecules do?
A
they ionise (split) forming hydrogen ions and hydroxide ions
2
Q
what is the rule we need to know?
A
hydrogen is produced at the cathode if the metal is more reactive than hydrogen
3
Q
what is produced at the anode normally using an aqueous solution?
A
oxygen
4
Q
what is platinum (metal) often used as?
A
used as inert (unreactive) electrodes
5
Q
what is the 2nd rule we need to know?
A
if the aqueous solution contains halide ions, then the halogen will be produced at the anode
