what is electrolysis
the splitting up of ionic compounds using electricity
when can ionoc compounds conduct electricity
when molten
How do you make ions free to move and therefore conduct electricity
You melt or dissolve ionic compunds
What happens in terms of outer shell electrons when metal atoms react
loose electrons
what sort of ion do all metal atoms form
positive catalyst
what type of ions do non metals form
negative ions
what are the melting points of ionic compunds like and why
High melting points because a lot of energy is needed to overcome the elctrostatic forces between the ions
what is the negative electrode called
cathode
what is the positive electrode called
anode
what are the electrodes used in electrolysis made out of
A rod of graphite, stainless steal, platinum
why cant carbon be used to extract all metals from there compound
becaause more reactive metals are not displaced by carbon therefore stay in their compunds
how do you react more reaative metals (than carbon) from their compounds
electrolysis
why specific material used as electrodes
they are good conductors of electricty, chemical stable (inert) and can withstand high tempurates
why does the ionic compund need to be molton before electrolysis can occur
it must be molton in order to conduct electricity
what are 2 examples of metals that must be extracted using electrolysis
aluminium and sodium
how is aluminium naturally found
as the ore aluminoum oxide
too reactive to be extracted by carbon so must be extracted by electroysis
Last changed6 months ago