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    Please, Help Urgently:
    1)Aluminium is made by the reduction of molten aluminium ore, using a very large amount of electricity.
    (i) How is iron ore reduced is a blast furnace to make iron?

    2)
    a)
    Aluminium is more exspensive than iron. Why is aluminium and not iron used for the central core in power cables?
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    (Original post by King101)
    Aluminium is more exspensive than iron. Why is aluminium and not iron used for the central core in power cables?
    Aluminium is no doubt more expensive than iron but is far more electrically conductive. Iron is a relatively poor conductor. It is also much lighter and thus will reduce the weight of the conductor.
    Copper is another good conductor but is quite heavy.

    Can't quite understand the first question

    Edit: Iron rusts, so that would also cause maintenance problems.
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    iron ore is reduced in a blast furnace. carbon monoxide as the reducing agent
    C + O2 ->CO2
    CO2 + C ->2CO
    Fe2O3 + 3CO -> 2Fe 3CO2
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    Ok, if you dont know the first one, then how about this question:
    1)Sodium is one of the most abundant metals on earth.
    Explain, as fully as you can, why sodium was not extracted until 1807?
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    (Original post by king101)
    Ok, if you dont know the first one, then how about this question:
    1)Sodium is one of the most abundant metals on earth.
    Explain, as fully as you can, why sodium was not extracted until 1807?

    The reason is that sodium attaches itself very strongly to other elements. Its compounds are very difficult to break apart. It was not until 1807 that an English chemist found a way to extract sodium from its compounds.

    Is that okay?
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    (Original post by Starless Eyes)
    The reason is that sodium attaches itself very strongly to other elements. Its compounds are very difficult to break apart. It was not until 1807 that an English chemist found a way to extract sodium from its compounds.

    Is that okay?
    Think electricity!

    When was it discovered and developed?
 
 
 
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