Which is the most satisfactory solvent for alumina,Al 2 O 3 , in the electrolyti

Question

Which is the most satisfactory solvent for alumina,Al2O3, in the electrolytic process for thepreparation of aluminum? A. liquid water, H2O B. molten cryolite, Na3AlF6 C. molten bauxite, Al2O3 with otheroxides D. molten sodium chloride, NaCl Please EXPLAIN youranswer. Which is the most satisfactory solvent for alumina,Al2O3, in the electrolytic process for thepreparation of aluminum? A. liquid water, H2O B. molten cryolite, Na3AlF6 C. molten bauxite, Al2O3 with otheroxides D. molten sodium chloride, NaCl Please EXPLAIN youranswer. C. molten bauxite, Al2O3 with otheroxides D. molten sodium chloride, NaCl Please EXPLAIN youranswer.

Explanation / Answer

      Explaination :        For obtaining aluminium from alumina by electrolytic method,first alumina has to be made in a solution or fused (liquid state).However, the melting point of alumina is very high(~1600o C), and thus is very high to obtain. Therefore, it is dissolved in cryolite solution, which reducesthe boiling point to close to 900o C, thus optimizingthe preparation of aluminium, at lower input costs.

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