In an electrolytic tank, aluminium metal is being extracted by the electrolysis of molten aluminium oxide using carbon electrodes. It is observed that one of the carbon electrodes is gradually burnt away and has to be replaced.
(a) Which carbon electrode (cathode or anode) is burnt away ?
(b) Why is this carbon electrode burnt away ?
Lakhmir Singh Chemistry Class 10
Answers
Answered by
0
Answer:
a) During the electrolysis of molten aluminium oxide using carbon electrode conducted in an electrolytic tank, the electrode that was observed to be burnt away was the anode.
b) During the extraction of aluminium from aluminium oxide by electrolysis, anode seems to burn away because of the reaction of oxygen produced during the procedure with carbon in the anode which gives carbon dioxide, a gas.
Answered by
0
Answer:During the electrolytic reduction of Al2O3 , the oxygen is liberatet ant the anode which is made up of carbon so this anode burns with oxygen to form CO2.
Explanation:
Similar questions