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Suggest a condition under which magnesium could reduce alumina. The two equations are : (a) 4/3Al + O_2 to 2/3 Al_2O_3 (b) 2Mg + O_2 to 2MgO |
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Answer» SOLUTION :At the point of intersection of the `Al_2O_3` and MGO curves (marked "A" in ELLINGHAM diagram), the `A,G^(Theta)`becomes ZERO for the reaction: `2/3Al_2O_3 + 2Mg to 2MgO + 4/3 Al` - Below that point magnesium can REDUCE ALUMINA. |
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