Aluminium is extracted from its oxide by electrolysis. To do so, the oxide is dissolved.
Which substance is used to dissolve aluminium oxide and where is aluminium deposited during the electrolysis?
1 )
substance used to dissolve aluminium oxide: cryolite / where aluminium is deposited: anode (+ve)
substance used to dissolve aluminium oxide: cryolite / where aluminium is deposited: cathode (–ve)
3 )
substance used to dissolve aluminium oxide: water / where aluminium is deposited: anode (+ve)
4 )
substance used to dissolve aluminium oxide: water / where aluminium is deposited: cathode (–ve)
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