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Although thermodynamically feasible, in practice alumina is not reduced using magnesium. Why? |
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Answer» Solution :Temperature above the point of intersection of `Al_2 O_3` and MgO curves, Mg can REDUCE `Al_2 O_3`. But the temperature required (1600 K) is very high. Hence the reduction process will be uneconomic and difficult. `Fe_2 O_3+ 2Aloverset( 1000-1500^@ C ) toAl_2 O_3+2Fe ` The ignition helps to OVERCOME the energy of activitation and hence the REACTION is fast. |
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