Electrolysis Flashcards
electrolysis definition
the break down of an ionic compound using electricity
The ionic compound need to be…
molten or aqueous - the ions are free to move and carry charge
equipment
- beaker
- electrodes
- power supply
electrodes PANIC
positive anode
negative is cathode
i.e panic
all of the negative ions are…
attracted to the anode
all of the positive ions are…
attracted to the cathode
via the electrodes electrons are…
transferred to make ions into atoms
When an ion becomes an atom by gaining or losing electrons it is…
discharged
the reason why electrons can travel from electrode to electrode is because the electrolysis set up is practically a….
circuit
Extraction of_________ needs to be memorised?
aluminium
what is the ore for aluminium oxide?
bauxite
problem with extracting aluminium from its ore?
it has an extremely high melting point
What is the aluminium oxide dissolved in to lower melting point?
cryolite
Aluminium is made at the….
cathode
Why may you need to replace the anode during the electrolysis of Aluminium Oxide?
The anode is made of graphite (allotrope of carbon) when the reaction gets very hot (it is molten afterall), the oxygen begins to react with the carbon of the anode forming carbon dioxide and diffusing into the air.
