The diagram below shows method used to extract aluminium by the electrolysis of molten bauxite. (i) Give equation for the reaction occurring at the two electrode. Anode Cathode...

      

The diagram below shows method used to extract aluminium by the electrolysis of molten
bauxite.
52020191409.png
(i) Give equation for the reaction occurring at the two electrode.
Anode
Cathode
(ii) In this process the anode rod have to be replaced from time to time. Explain.
(iii) The working temperature in this cell is below the normal melting point of the
purified ore. Explain the significance of this situation and how it is achieved.

  

Answers


sharon
52020191418.png
(ii) At the electric temperature graphite roads reacts completely with oxygen to form Carbon
(IV) oxide, though the rods are eroded completely.
(iii) Molten cryolite is added which lower up of the one which eventually lowers running
costs of the system
sharon kalunda answered the question on May 20, 2019 at 11:18


Next: The table below gives some properties of three metals: Aluminium, iron and copper. Use it to answer the questions that follow.
Previous: State four industrial uses of Aluminium

View More Chemistry Questions and Answers | Return to Questions Index


Exams With Marking Schemes

Related Questions