CHAPTER 6/7 Flashcards
what is the compound that gets broken down in electrolysis
electrolyte
what is the anode
positive electrode
what is the cathode
negative electrode
what happens in electrolysis
positive ions go to negative electrode
negative ions go to positive electrode
why are substance only electrolysed in molten
ions are free to move around
what is produced at the anode
the gas of the electrolyte
what type of bonding is present in compounds that can be electrolysed
ionic
what is a half equation
it shows movement of the electrons at the anodes
in aqueous solutions what is produced at the cathode
charged metal ions
hydrogen
uses of aluminium
pans
drink cans
foil
aeroplanes
what is mixed with aluminium to bring its melting point down
cryolite
when is hydrogen at the cathode
when the metal is more reactive
what ore is aluminium found in
bauxite
what is formed at the electrode
least reactive element
what is the positive electrode called
anode
what is the negative electrode called
cathode
when is hydrogen gas formed
when an aqueous solution is electrolysed and the metal is more reactive
what happens at the anode
oxidation loss of electrons
what happens at the cathode
reduction is gain of electrons
where do metals go
anode
how is carbon used to extract metals
it absorbs the oxygen from the oxide and turns into co2
when to use electrolysis
when the element is more reactive than carbon
